> It used to be that even-numbered releases fixed bugs and stabilized the OS, with notable features coming in odd-numbered releases.
That's a myth. The stability comes from minor bug fix updates, not from major updates. And the even-numbered Mac OS X 10.4 Tiger for example had huge new features, such as Spotlight, Dashboard, VoiceOver, etc. Mac OS X 10.2 Jaguar also had huge new features.