A recent post on Apple Matters argued that the recent resurgence of Apple is bad news for Linux:
In the last two years, OS X has seen continual growth, from 4.21% in Jan 2006 (the first month of figures), to 5.67% in December 2006, to 7.31% in December 2007.
In the same time, Linux’s percentage has risen from only 0.29% to 0.63%. Although depending on how you apply the maths—you can put a positive slant on that by saying it’s more than doubled—the cold truth is Linux on the desktop is still barely worth mentioning. To paraphrase: reports of [Linux's] life have been greatly exaggerated.
I strongly disagree, so I’ll try to explain why this is a very exciting time for Linux.
If NetApplications’s numbers are right, Linux has grown 117% in two years. That’s pretty good, and considerably better than Apple’s 74%. In fact, at this rate it will take less than 13 years to have 100% of the market share! (at which point Apple will have 270%… weird).
Silly extrapolations aside, I don’t think a growth rate of almost 50% per year needs a “positive slant” to be impressive, but what really bothers me is the perception that there is some sort of conflict between Apple and Linux, and that Apple’s victories in this conflict are somehow bad for Linux. Maybe that’s not what Howard is saying, but he certainly suggests that these recent numbers reflect poorly on Linux. That suggestion is very false.
Although Linux’s market share remains small, network effects make these recent statistics very exciting. Wikipedia defines a “network effect” as “a characteristic that causes a good or service to have a value to a potential customer which depends on the number of other customers who own the good or are users of the service.” Linux has many such characteristics, the most obvious being that it is open source software, which means any developers that use Linux can fix bugs they find, which improves the product for everybody else. This improved quality attracts more users, and a positive feedback loop results just like the one that fueled Wikipedia’s rapid growth.
Open source is Linux’s long-term advantage against Mac and Windows, but there are also very powerful network effects associated with any operating system, and these may be more relevant in the short term. If everybody at your office or school is using a particular operating system, it makes a lot of sense for you to use it, too; the more people use an operating system, the more value that operating system has to a given user (holding other things fixed).
You’ve probably heard about how Microsoft in its early days, realized the power of network effects and actually paid computer manufactures to install windows on the computers they sold. By acquiring a large portion of the market, Microsoft added a lot of value to Windows, which led more people to buy Windows, which made added more value to it, which eventually meant Microsoft could charge a high price for Windows even when viable alternatives (like Linux) are free to download.
In any case, Linux has become a little bit more valuable thanks to that extra .34% market share. You might say “sure, but an extra .34% of the market can’t be that much.” I disagree. When an OS has a very small share of the market, each additional .1% adds a lot more value than when an OS has a large market share like Windows. Imagine an extra 1% of the population started using Windows, raising its market share from ninety-something to ninety-something-plus-one percent. Most Windows users probably wouldn’t know the difference. If I’m a college student, almost everybody living in my hall will be using Windows either way. But a 1% increase in market share is huge for an OS with a small market share. An increase from .5% to 1.5% might mean that there will be enough students on any college campus to have a healthy Linux-users’ mailing list and perhaps a Linux-users’ Wiki, making it much easier for students and effectively use Linux on campus. And if an extra 1% of the population switches to Linux, that translates to thousands more people every day reporting problems and finding solutions on the Ubuntu forums and other support milieus.
This means, as Windows loses momentum, Linux may be picking up speed. Furthermore, as users switch from Windows to Apple, Windows loses some value from network effects, and Linux looks relatively more attractive. So Linux and Apple are friends. For now, at least.
Apple has done a great job in recent years, and Microsoft’s blunders have bolstered its success. Probably most people that have ditched Microsoft because of Vista have wisely switched to Apple. But this is good news for Linux, too.