Consumer Group Demands XP for Vista Victims
thefickler writes "Dissatisfaction with Windows Vista seems to be swelling, with the Dutch Consumers' Union (Consumentenbond) asking Microsoft to supply unhappy Vista users with a free copy of Windows XP. Not surprisingly, Microsoft refused. This prompted Consumentenbond to advise consumers to ask for XP, rather than Vista, when buying a new computer."
WinVista lacks a LOT of drivers (for fairly common hardware, too). If you have hardware that WinVista doesn't support, you're unhappy (see years of previous complaints about Linux).
WinVista also has lots of eye-candy which eats up processor time. So it looks pretty, but runs slower. The eye-candy can be turned off, but then it looks a lot like WinXP.
WinVista has a different security model than WinXP and it takes people some effort to learn and in the meantime, they're unhappy with it (again, see years of previous complaints about Linux).
Not all of your apps will run with WinVista, unless you use "compatibility mode" or do some extra steps.
Which is why Microsoft extended WinXP for OEM's.