Once upon a time, Mac users could chuckle heartily at Windows users. After every Windows Update, you'd get that prompt to restart your computer, and it was annoying. If you're the kind of person who thinks that computers should serve rather than be served, you've probably got about a half dozen or more applications open, each containing reference material or partially completed work.
Damn, those restarts were annoying.
However, it's almost every other week that there's some update to Quicktime, Safari or iTunes, each adding more features that I don't care about (Ping? Yet another social network, but one that's only accessible via the locked-down iTunes ecosystem? Seriously..?) I don't need my iTunes to support the latest devices from Apple: I haven't bought anything from them since my first-generation iPod touch (which still works superbly, by the way: I have no intentions of replacing it).
Going back to that 'once upon a time', apps used to run on top of Mac OS. Now, Apple does what got Microsoft into so much hot water at the turn of the millennium: integrating home-grown apps into the operating system (otherwise known as 'gaining unfair advantage over competitors'). So, after updating to Mac OS 10.6.5 and restarting (ok, operating system updates require restarts), I find that iTunes and Safari are both needing updated, also nagging for a restart.
Well done, Apple. You are the new Microsoft. Enjoy the bubble.