We need to start a petition to get directx or similar working on Ubuntu. Then all would be great and right in the world. But regarding xp, if it aint broke why pay outrageous amounts of cash for something inferior. Yes inferior. No ip blocking working correctly and driver issues served on a silver plattter. No thanks I'll pass.
Weak PC's and needing support for antiquated programs are the only reason I can think of that any one would want to stay with XP.
I used to hate Vista before I tried it. I heard tons of horrer stories of it, but once I tried it and found out about the changes to it, I switched and never looked back.