About the price...
Our Steve Jobs claimed that Apple shipped five "major" updates to OS X, including Cheetah, Puma, Jaguar, Panther, and Tiger, though I'd argue that virtually none of those were major updates at all. (Unless you count the cost, at $129 for each version, that's about $774 on Mac OS X upgrades since 2001. That kind of puts the cost of Windows in perspective.)
He also counted Tiger on Intel as a sixth major release, because of the effort in porting the OS X code to a new platform (which, actually, had been in the works for a long time and wasn't the 210 day project Stevo claimed).
So $774 OSX vs. $400 Vista
Now it makes me think, have i spent my money well? 😡
let's open our mind