Symbian

In the recent series of exposés on Nokia's new strategy I sought to paint a background for what caused such a dramatic decision:

• A history of previous Microsoft "strategic alliances" in mobile brought Microsoft to a level of desperation
• The question of how many horses are in the race coupled with operator feedback on what matters to them in terms of balance of supplier power
• The installed base of Symbian although great is fragile
• A confused tablet strategy from both partners.
• The impact of pricing on addressable market and share
• The "Osborne effect" on Symbian and how the transition could be impossible to navigate

This gives a backdrop to the decision, but it does not explain the most crucial part of the decision: why did Stephen Elop decide to maintain an exclusive platform for Nokia rather than a multi-platform approach as chosen by successful competitors such as HTC, Samsung and Sony Ericsson.

Going from backing one "burning" platform exclusively to backing another "ice cold" alternative without bothering with a hedging alternative is very risky. This may be the biggest puzzle and mystery for outside observers.

Here I put forward a few reasons why exclusivity attracted Nokia:

1. The lessons of product focus (see why focusing on a few products is hard).
2. The costs associated with Symbian and Meego were unreasonably high. (see Nokia employs as many people to develop its smartphone software as Apple does to develop all its products).
3. The psychology of change management.

This last one may be the most crucial of all.

What has to be appreciated is how bloated Nokia has become. It has 140 thousand employees. It's been organized and re-organized countless times and is completely intractable even to insiders. Cutting headcount can only accomplish so much. It deals with costs, but not with motivation. What management needs to do is also incentivize the survivors.

This is where exclusivity comes in as a motivational tool.

To explain we need to dip into a new metaphor. Conquistador Hernan Cortés landed in Mexico with the intention to conquer it. Legend has it that as soon as he landed, he burned his ships to prevent his men from retreating and motivating them that conquest their only option.[1]

Leaders motivating their followers by removing the means to surrender or retreat is not uncommon. It's harsh and brutal. It's not a natural thing do do: destroying perfectly useful options is value destructive and generates outrage, even mutiny.

In Nokia's case, institutional inertia with a vestigial Symbian effort would compel the organization to maintain the current platform while treating the new alternative as a pathogen.

Counter-distruption theory states that the response to a disruption requires a focused approach through an autonomous challenger protected from corporate antibodies by the CEO herself. In this case, the autonomous organization is outside the company (Microsoft). Protecting the new effort was not possible with a Chinese wall. The only alternative was to simply get rid of the old and start with a clean slate.

While there are times it makes sense to burn ships to eliminate any ideas of retreat, there are other times when doing so is reckless. You can do the calculation on the basis of cost of being wrong and levels of uncertainty [2], but even when armed with all the data linked above, this decision can hardly become something that can be quantified.

It's a gut-level decision.

I would say that Nokia's new CEO did not just jump off a "burning platform" but that once he jumped he made sure it kept burning so that nobody thought of going back on board.

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Notes:

1. There is a Microsoft precedent to this story. See Amazon.com: Burning the Ships: Transforming Your Company's Culture Through Intellectual Property Strategy (9780470432150): Marshall Phelps, David Kline: Books Burning the Ships recounts the decision that forced Microsoft to face its own 'succeed or die' moment. It's a lesson in strategy and survival that speaks about the courage required to embrace radical business transformation.
2. See also: Burning Ships

In the quarterly smartphone summary published here, I noted the significant acceleration of Android sales at the expense of "other" and Windows Mobile/Phone. Some share was also lost to Symbian. This might be seen as justification for the "platform jump" that Nokia undertook.

In a second discussion, I published the history and life cycles of the smartphone platforms, identifying 10 platforms (out of 16) still in the market. This challenged the view that it was a two horse race today and that it will become no more than a three horse race in the future.

Questions came up about the "quality" of these platforms. Clearly some are barely viable while some are thriving. To explain the value of a platform, one metric we can use is the cumulative sales which allows us to derive the installed base.

The following charts do just that.

This first chart shows the cumulative total of units sold since Q2 2007. This is the sum of all smartphones sold in the last 3.5 years. There are some interesting patterns here, but right now we want to focus on the installed base.

3.5 years of cumulative sales is an upper bound on the installed base. We can get a better estimate the phones in use by subtracting from the base phones older than 2.5 years. This is shown in the second chart below:

As of the last quarter, Nokia's Symbian is likely to have 200 million in use. Apple may have about 85 million iPhones in use (this excludes iPod touch and iPads) and Android about 75 million. RIM is around 95 million and Windows Mobile less than 40 million.

What's interesting is that of these installed bases, the largest is the one that's just been abandoned, and the smallest was chosen as its replacement. Even that's not quite fair since Windows Mobile is not a valid replacement. It's Windows Phone that was chosen and that probably has an installed base of about 1 million [Unlike the measurement of units shipped, Microsoft reported two million licenses were sold to OEMs who had to build those into phones which would be shipped to carriers and distributors. One million may be a generous estimate.]

The bottom line is that there are about 5 Windows Phone users for every 1000 Symbian users. In other words, Nokia jumped from the "burning" 200 million user Symbian platform to the "ice cold" 1 million user Windows Phone platform.

The disposal of such a large installed base must count among the largest divestitures in technology history and, when coupled with the adoption of the least-tested alternative as a replacement, elevates platform risk-taking to a new level. It may seem bold, but there is a fine line between courage and recklessness.

I'll do my own "dive" into the possible justification for this in a future posting.

When Stephen Elop said that Nokia and Microsoft sought to create a "three horse race" he implied that there were only two viable mobile ecosystems today. With that statement he sought to deprecate or declare "end of life" two platforms: Symbian and MeeGo, implying that Nokia's efforts at being the third way failed.

However, he also implicitly declared irrelevant a larger set of market participants. In fact, the market is awash with platforms. Far more than the three or five that Stephen considered.

To illustrate I built the following chart showing the history of all major mobile platforms. The are ranked by launch date (earliest at the bottom). A vertical line marks the present. End dates are approximate and based on declarations of end of life rather than end of usage.

There have been 16 total mobile platforms[1], 10 of which are still (or soon will be) on the market. Of the six that were terminated, three had replacements built by the same orchestrating company (Windows Mobile begat Windows Phone; Maemo begat MeeGo, and PalmOS eventually led to WebOS.) Only three reached end of life with no known descendant (iMode, MeeGo[2] and Symbian).

Operating systems that were launched in the 1990s or early 2000s have mostly been withdrawn/replaced with the exception of Java and BREW.  "Modern" operating systems all emerged after 2007 (following iOS). A total of eight such new OSs were introduced in four years[3].

What I find noteworthy is that there is an implied peculiar fatalism about the market when only two platforms are considered viable, neither of which are more than 3 years old. While visiting the Mobile World Congress, I sensed this jumping to conclusions about platforms was eerily similar to that of a few years ago when new entrants like Apple and Google were declared dead on arrival.

I can only conclude that there is a great deal of groupthink going on in the industry. A perfect setting for a disruptive entrant to change everything, all over again.

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Notes:

1. I excluded some platforms like Motorola's Linux, SavaJe and perhaps some others (Openmoko, Qtopia) which did not gain significant traction. I also excluded any embedded OSs which did not have native APIs.
2. The end of MeeGo is speculative. Intel is still defending it and may continue developing it.
3. Android variants like Tapas could be considered new platforms, but I maintain them as part of one OS for the time being.

Stephen Elop stated that Nokia expects to sell approximately 150 million more Symbian devices before the transition to Windows Phone is complete. Assuming that figure is achievable (which is far from certain) I tried to understand how that figure will affect the volume and share numbers for Nokia in the coming years.

It's very likely that the first WP phones will not ship in large volumes until 2012. Product development cycles being what they are, unless there is an ODM rebranding (i.e. taking an HTC phone and gluing a Nokia sticker on it) the minimum development time is at least 12 months. Keep in mind that Nokia does not have engineers to build such a product today and hiring them alone can take months.

The following two charts show what a two year forecast that adds up to 150 million Symbian devices looks like. I assumed Windows Phones begin to ship in 2012 and, keeping in mind that WP7 is designed for a higher hardware specification than the current Symbian phones, I show a modest ramp for a total of 15 million units in the first year.

I also forecast the overall market assuming continuing growth levels and calculated the effect of Nokia's share.

The share at the end of 2012 would be approximately 6%.

Note however that the share above depends highly on Nokia selling 150 million Symbian units in the next two years. One could question why would anyone buy a product whose platform that's been declared end of life. Perhaps there is a built-in assumption that end users are inherently stupid. However even in that scenario the question is which distributors will make the same bet with Nokia? Or, even more perplexing, which operators are willing to stock EOL products for two years when that shelf space is getting strong bids from Nokia's rivals.

Microsoft's new "strategic partnership" with Nokia is not its first. For a decade the software company has courted and consummated relationships with a variety of companies in mobile and telecom. Here are the ones I can remember:

• LG. In February 2009 Microsoft Corp. signed a multiyear agreement for Windows Mobile to be included on devices from LG Electronics Inc. LG would use Windows Mobile as its "primary platform" for smartphones and produce about 50 models running the software.

What happened? LG made a few Windows Mobile devices but with WinMo uncompetitive, they abandoned the platform and moved to Android losing years of market presence and all their profits.

• Motorola. In September 2003, Motorola  and Microsoft announced an alliance. "Starting with the introduction of the new Motorola MPx200 mobile phone with Microsoft Windows Mobile software, the companies will collaborate on a series of Smartphone and Pocket PC wireless devices designed to create a virtual "remote control" for the Web-centric, work-centric, always-on-the-go mobile professional." In addition, the alliance includes cooperation on joint marketing and wireless developer programs.

What happened? Motorola launched a series of Windows Mobile phones culminating in the Motorola Q "Blackberry killer". As Motorola hit the rocks in profitability new management reached for the Android liferaft. The company now relies exclusively on the Droid franchise.

• Palm. In September 2005 Palm and Microsoft announced a strategic alliance to "accelerate the Smartphone market segment with a new device for mobile professionals and businesses. Palm has licensed the Microsoft Windows Mobile operating system for an expanded line of Treo Smartphones, the first of which will be available on Verizon Wireless’ national wireless broadband network."

What happened? Palm shipped a few Windows Mobile, famously dismissing Apple's potential entry as something "PC guys" could never achieve. A new CEO, a private placement and an acquisition later the company is a division of HP making its own operating system.

• Nortel. When Steve Ballmer was famously laughing at the iPhone and saying that he likes the Windows Mobile strategy "a lot" he was sitting next to the then-CEO of Nortel (Mike Zafirovski formerly of Motorola) with whom the company had just closed a strategic deal.  "an alliance between Microsoft and Nortel announced in July 2006 ...  includes three new joint solutions to dramatically improve business communications by breaking down the barriers between voice, e-mail, instant messaging, multimedia conferencing and other forms of communication".

What happened? Nortel declared bankruptcy two years later.

• Verizon. In January 2009 "Verizon Wireless has selected Microsoft Corp. to provide portal, local and Internet search as well as mobile advertising services to customers on its devices. The five-year agreement will go into effect in the first half of 2009 when Microsoft Live Search is targeted to be available on new Verizon Wireless feature phones and smartphones." The deal would ensure Bing distribution to all of Verizon's smartphone customers.

What happened? Bing did ship on some devices but in October 2009 Droid came to Verizon.

• Ericsson. In September 2000, "Ericsson and Microsoft Corp. today launched Ericsson Microsoft Mobile Venture AB. This previously announced joint company will drive the mobile Internet by developing and marketing mobile e-mail solutions for operators. The first solutions are expected to be on the market by the end of the year. The company is part of a broader strategic alliance between Ericsson and Microsoft"

What happened? Ericsson divested itself of the mobile division forming a joint venture which would go on and make more strategic alliances with Microsoft over Windows Mobile culminating in a loss of profits and eventual flight to Android.

• Sendo. In February 2001, Microsoft announced a partnership, in which Microsoft bought $12m of Sendo shares and a seat on the board. Sendo was to be Microsoft's "go to market partner" for the Stinger smartphone platform that would become Smartphone 2002.

What happened? Sendo after litigating IP issues with Microsoft went bankrupt in 2005.

And finally,

• Nokia. No, not this OS deal, but in August 2009 "The worldwide leader in software and the world’s largest smartphone manufacturer have entered into an alliance that is set to deliver a groundbreaking, enterprise-grade solution for mobile productivity. Today, Microsoft Business Division President Stephen Elop and Nokia’s Executive Vice President for Devices Kai Öistämö announced the agreement, outlining a shared vision for the future of mobile productivity. This is the first time that either company has embarked on an alliance of this scope and nature."

The plan was to bring "Microsoft Office Mobile and Microsoft business communications, collaboration and device management software to Nokia’s Symbian devices."

What happened? One and a half years later the same Stephen Elop announced that Symbian will be deprecated.

Predictions on Nokia’s new platform strategy: new OS for the US | asymco.

Here are my predictions from January 27 for the February 11 Nokia strategy announcement followed by the actual quotes from Nokia's press release:

• Prediction: There will be a multiple OS strategy.

Actual: The following sub-units [make up] Smart Devices: Symbian Smartphones, MeeGo Computers, Strategic Business Operations. To support the planned new partnership with Microsoft, Smart Devices will be responsible for creating a winning Windows Phone portfolio.

• Prediction: The US market will be the first to see a new non-Nokia OS. I would guess Windows Phone with AT&T.

Actual: "Plans for a broad strategic partnership with Microsoft to build a new global mobile ecosystem; Windows Phone would serve as Nokia's primary smartphone platform"

• Low end devices will remain with Symbian due to price considerations for the chipsets, components.

Actual: "Symbian becomes a franchise platform, leveraging previous investments to harvest additional value. This strategy recognizes the opportunity to retain and transition the installed base of 200 million Symbian owners. Nokia expects to sell approximately 150 million more Symbian devices in the years to come."

• Prediction: MeeGo will be phased out in phone products but development will continue for tablets

Actual: Under the new strategy, MeeGo becomes an open-source, mobile operating system project. MeeGo will place increased emphasis on longer-term market exploration of next-generation devices, platforms and user experiences

More details to follow, but so far it looks like there are no surprises.

The smartphone market has grown threefold in the span of three years. However, as noted previously, the share of units running a licensed OS has not grown dramatically. The following chart shows the vendors' shares with the same brown/green dichotomy between licensed and unlicensed OS's.

In order to gain some insight into this licensed OS area (and who the "others" are) we need some visibility into which OSs are being licensed and what their shares are.

The following chart shows the share of the various licensed platforms[1]. (I blanked out the Integrated vendors.)

Before we dive in to understand the effect of Android, we have to understand the licensing of OSs in 2007.

The chart shows Windows Mobile and "Other" splitting the market. Windows Mobile is rather easy to understand. It was still growing as a platform and Ballmer was famously quoted in 2007 as saying he liked their strategy "a lot".

But "Other" is something of a mystery. What "Other" actually mostly meant was Symbian[2]. But not only the Symbian that Nokia was shipping and licensing to some vendors. At the time, Symbian also had a version called MOAP "Mobile Oriented Applications Platform" which was in use in Japan (somewhat analogous to the variants of Android now in use in China).

Fujitsu, Mitsubishi, Sony Ericsson and Sharp developed phones for NTT DoCoMo, using an interface developed specifically for DoCoMo's FOMA "Freedom of Mobile Access" network brand. This UI platform was based on the UI from earlier Fujitsu FOMA models[3]. The user could not install new C++ applications and therefore these were not platform devices, however the industry still included these units as "smartphones" .

So what we've witnessed in the last two to three years is the replacement of MOAP and Windows Mobile share with Android TAPAS and OMS.[4]

But, more significantly, when looking at the rise of Samsung and Motorola and HTC we were also witnessing the demise of Palm, Fujitsu, Mitsubishi and Sharp (plus a myriad of Windows Mobile licensees even larger than the Android army).

The significance here is that "other" in smartphones is still mostly about branded vendors. This is in stark contrast to the low-end of the phone market where “others” are quickly replacing branded vendors.

So we can conclude that the smartphone market is so far showing a distinct preference for branded vendors. The value of the brand is still evident. But ZTE and Huawei are quickly developing Android competencies. How long will it be before the branded vendors feel the pressure from the upstarts?

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Notes:

1. The Other category includes WebOS which was not licensed during this time frame but is not material enough in terms of share.
2. A few million units running flavors of Linux were also on the market in 2007/2008.
3. FOMA was also implemented with a Linux OS and the same UI.
4. It should be noted that except for Windows Mobile, all the licensed mobile OSs including LiMO and Symbian are now open source. Android's success is not therefore due to being the only OS that is "open".

In a recent post I pointed out that Apple's R&D was about 2.2% of sales in the last quarter. Bernstein took a look at the R&D for Nokia and presented a chart showing the difference between the mobile industry players in terms of total expenditure on R&D.

I took inspiration from that to plot the Devices R&D for both Nokia and Apple over the entire 2010 period. I also compared that with sales and computed the ratio between R&D and sales.

The result is shown in the chart on the left.

Bottom line: Nokia spent 10.2% of phone sales in 2010 on phone R&D while Apple spent 2.5%.

Bernstein goes on to argue that at least for Devices,

Nokia spent $3.9bn in R&D in 2010, almost 3x the average of its peers, 31% of the industry's R&D total spending, for an output that we can qualify as visibly disappointing.

To relate the $3.9 billion for Devices into head count, they estimate that Symbian projects employ 6,200 people; MeeGo and Qt 1,800; Services 1,800; and S40 1,800. Hardware headcount is assumed to be 4,700 and 900 more for fundamental research.

So Nokia's total software headcount adds up to 11,600 people. Nokia smartphone headcount adds up to about 8,000.

Applying a similar formula ($240k/employee[1]) to Apple's estimated iPhone R&D (from Bernstein's chart) yields a headcount of about 3,200 and a total Apple company R&D headcount of 8,200.

So Nokia employs about the same number of engineers[2] for its smartphone software platforms as Apple does for all its product lines[3].

In fact, Symbian alone may cost twice as much to develop than the iPhone (including the hardware).

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Notes:

1. The cost per employee is obviously different between the companies as they operate in different countries. However there are enough sources of error in these estimates that they probably overwhelm the cost of living/tax differentials.
2. I know that engineers are not all that R&D headcount covers, but let's assume that the mix of overhead is similar for the two companies.
3. The total for Symbian + MeeGo is 8000 and the total for Apple overall is 8,200, however one can comfortably allocate 200 out of 900 researchers out of Nokia research to their mobile software effort.

Yesterday I made my predictions on Nokia's new platform strategy. They should  be treated as pure guesswork, but they are informed guesses. I based them on public information.

That information comes in the form of statements from Nokia's CEO at the earnings call. I made a table of all the statements that dealt with platform decisions and my interpretations of those statements.

You may do your own interpretation, but to me there is significant evidence here to support my predictions.

What Elop Said	My interpretation
In certain markets where there’s a greater preponderance of competing platform devices, we have some competitiveness problems	We have problems in the US
Broadly the conversation about operating system and positioning of relative operating systems in different places is something that we'll reserve for the February 11th meeting,	Different markets require different operating systems
The general comment I’d like to make though is that in today’s world it is the case that given the different price performance characteristics of different chipsets, we get into situations, where the best experiences are not necessarily delivered by systems that are capable of delivering the highest end experiences. We have to be very mindful at what level of the price curve we deliver what type of device with what operating system.	Different price points require different operating systems
When I think about geographies, the area, I've mentioned this indirectly during my comments, but I'll be more precise in answering your question and that is clearly, there is a pattern of disappointments in the United States. A pattern there where efforts have been made, competitiveness, challenges exist and we very much need to address those	We have problems in the US. We're going to address these.
That's why I characterize very clearly in the framework for the decision making ahead, that whatever the strategy is that we outline on February 11th, we very clearly will be ensuring that it gives us the opportunity to reopen doors in markets such as the US and some others where we have not recently been present	We are going to enter the US with this platform
With respect to the question of ecosystems and so forth, it's important to note, in my opening comments, I referenced the fact that there are today different ecosystems and different patterns at play	Different OS for different markets
If you like the high-end ecosystems where there is particular rate of momentum and share gain taking place. At the same time, the dynamics at the very low end of market which itself is an ecosystem of sorts, is very different with very different demands and expectations	High end and low end require different OS
I'll just offer that observation that today broadly in the world without any specific comment on us or our competitors, there are multiple ecosystem patterns that need to be considered	More on the need for multiple OS
I'd also point out that very critical in whatever combination of ecosystem or ecosystems or whatever our strategy outlines, the need to maintain sustainable differentiation between ecosystems and within the ecosystem relative to our competitors in that ecosystem is a top priority. In everything we consider, that’s something that will be very much on our mind.	What we chose gives us some degree of differentiation--It's possible concessions were negotiated
With respect to comparisons to other ecosystem shifts and things like that, the real thing that one must focus on is the quality of products in the market, the momentum that one already has	Symbian is not going to disappear
As we’ve described the Symbian momentum that we have today; a consideration of shift of ecosystem, certainly you have to consider that potential of market share changes	Symbian will lose share
With respect to the ecosystem comment, without getting into specifics of different options and things like that in detail, what I will say is that the word catalyze is to imply that there is a wide variety of participants in our world, and that includes competitors, it includes operators, other technology firms and so forth who in many respects have a common interest relative to the potential strength of other ecosystems and how they may develop over time	Partner is a tech firm that has common interest -- i.e. market entry
The catalyst of an ecosystem could be considered as making sure the right conditions are formed in the right companies, work in such a way that alternatives emerge in a marketplace that may not exist today	Looking at growing the market for the partner-- Microsoft
We made a decision to not proceed as people have thought we would proceed	This is not going to be business as usual
You'll see that pattern of decision making from us in terms of being very crisp about what constitutes great experiences and ensuring that that is what we are delivering to our customers.	This is a marketing-led effort. We're going to stay on message and not waffle on about technology

Nokia must compete on an ecosystem to ecosystem basis.

In addition to great device experiences we must build, capitalize and/or join a competitive ecosystem. The ecosystem approach we select must be comprehensive and cover a wide range of utilities and services that customers expect today and anticipate in the future.

Nokia CEO Discusses Q4 2010 Results - Earnings Call Transcript - Seeking Alpha

These kind of statements are signaling that there will be fundamental changes announced.

Here are my guesses for the February 11 announcement:

1. There will be a multiple OS strategy
2. The US market will be the first to see a new non-Nokia OS. I would guess Windows Phone with AT&T.
3. Low end devices will remain with Symbian due to price considerations for the chipsets, components.
4. MeeGo will be phased out in phone products but development will continue for tablets

This may seem like a radical departure, but in many ways it's not. Nokia has nothing to lose in the US as its platforms have zero traction. By maintaining Symbian for low end devices, they can still aim for differentiation where Nokia feels it still has distribution and cost leverage. This strategy will also allow speed in time to market.

There is an assumption floating around the debates in this and other forums that the "battle" between mobile platforms is a land grab. The unspoken implication of this assumption is that once a user is captured she is permanently locked into the chosen platform never to move to another again as long as she lives.

For example @dutchtender remarked:

many people's first smart phone will be android. android can take them "cradle to grave." android will be there with a higher end solutions when they can afford it

This is a strong but untested claim. It may be true but we owe it a bit of thought.

A long time ago I tried to model platform growth is by using a version of Metcalfe's law. I suggested that the value of a network is proportional to n log (n) where n is number of nodes in that network[1]. This was somewhat based on common sense as it measures the possible links between n nodes with degradation due to the limits of social graphs.

The value the network creates is what developers as well as all the other participants in the ecosystem are able to tap into. The platform vendor gets to capture a share as well of course. As the value grows it tends to create network effects or a self-reinforcing cycle.

What I'm saying then is that we can treat a platform as a network, where each node is linked to another node by the commonality of experience.

The proxy of the model was Windows. Twenty years ago, having Windows meant that you could exchange files with other Windows users simulating a sort of network protocol. You could also ask your peer group for help and get software tips and new consumption ideas. So the more people used Windows the more likely it was that you also had to use it. Avoiding Windows limited your ability to be part of productive society (this is no longer true by the way, which is one reason Microsoft is in trouble).

If we fast forward to the mobile post-PC world, when it comes to platforms the shared experience is that of apps. People can communicate their app experiences and their usage better if they have the same platform. They can also learn from each other how to better use the products and how to solve problems. The more people that use a mobile platform, them more value it generates for platform participants.

The other factor determining value is that a platform also creates sunk costs. Usually called "investments" by users these are costs that are incurred and have a potential for future value. This means that the apps purchased and time spent learning and adjusting to the platform are sunk costs which users are reluctant to abandon. (Notwithstanding the fact that as sunk, these costs should be ignored when comparing the value of another platform,--psychology is what keeps users loyal even if it's not in their best interest.) This "sunk" factor of value is not as powerful as the sharing of experiences value since it does not scale with the number of users. That cost is a constant multiplier on top of the n log (n).

So the overall "value" of a platform is K n log(n). Where K is the stickiness of sunk costs.

Can this be stated plainly without the math?

When you compare two platforms you have to ask how contiguous users (n) grows and how stickiness (K) grows. The issue with fragmentation is that it actually cuts n. Many people won't be able to share experiences if their devices don't work the same way. Same with geographic density of a platform. If, as was the case with Symbian, there are few segments that became saturated with the platform then n is reduced.

The issue with a lack of paid or compelling apps is that it cuts stickiness, so that you don't have any sunk costs. Similarly the presence of ported or common apps means that K is reduced for any single platform. Nokia's Symbian has a serious problem with both consistency and with commonality of experience. RIMM depends too much on the commonality of messaging which is quickly becoming a commodity due to portability of the experience.

So in the end it's not just about how big the user base n is (which is the only thing that is measurable). It's how contiguous n is and how compelling the content.

This is too sketchy a model to be practically applied but it offers a thought experiment: does any given platform have

• A large, contiguous user base with strong concentrations of users in the same demographic or psychographic segments?
• A significant set of unique content (apps) which require costs from the user (in terms of data, time or cash)

It's not a clear cut case in my mind that Android benefits from these as much as iOS does. If that's the case, users are more likely to be moving on a one-way street between these two: from Android to iOS and not vice versa. The same thought experiment can be engaged in between any two platform contenders.

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[1] Metcalfe's law is actually an n*n growth curve but recent research indicates that social networks scale in value as n log (n).