Don't look at me. Still running Win2000.
I tend to stick with something that works, until I'm dragged kicking and screaming into the next level. At some point, some of my applications (many of which I DO keep at the cutting edge) are going to demand something beyond Win2000. Then we'll see.
Microsoft and other companies are, like aircraft approaching the speed of sound, getting resistance from customers to upgrades that provide a lot of things nobody ever uses, cost money, and use up more computing power. Still running Office 2003, too.