29 times? That's just insane. What kind of websites you visit? installmespyware.com? Heh j/k :P
Well, I think it actually dependes on the user. My Windows installations had always been heavily optimized, and I think all Windows installation need that, but most users prefer to format/reinstall instead of taking the hassle. In the last 5 years, I have only changed Windows 2 times: change from 2000 Pro to XP Pro, and when I finally got a DVD burner, so I did backups and did a fresh install to delete the partitions I had.
If you are willing to take the hassles of making Linux run fine, you can take the hassles of making Windows run fine too. But that's just me heh. I don't change to Linux because of games :P