It's unlikely to be missed.
7 is better at picking up hardware .. otherwise XP is quite solid.
As with Vista, I'll most likely be skipping 8.
A good NAT router, Malwarebytes, MS Security Essentials, CCleaner, and not clicking on every link thrown in one's path = a happy box.
imho
Microsoft support is good if you pay for it.
I'm using Win 7, and that's my whole suite.