This just shows that Win 8 is so bad that people wouldn’t switch to it even if they get paid to. I don’t mind switching to Windows 7, but if you don’t buy a computer with a touch screen, Windows 8 is absolutely horrible.
I think it is more an issue of cost.
It is very very very very difficult for users to move over their accumulated software from point a to b. If it was easier and MS did not make so many frustration blocks, it would be more attractive to upgrade faster.
(ie just moving harddrives etc.)