I'm one of those people unfortunately.

XP was all I needed for a decade. My firewall which has thousands of rules does not work with anything newer and other firewalls suck today, very badly.

I have many many programs which are licensed and I do not want to have to try to find the key for each one again, heck find the program again, only to find out it doesn't work beyond XP.

XP was just a launching UI for me, really could not care about how it looked. I have it very locked down and very tweaked.

And I really do not want to lose the months of getting something configured again. But come mid-April I won't have a choice.