Corporate customers need someone to call and yell at. If they can't blame Micro$haft or Red Hat, someone loses their job, and responsibility for bad decision might even *gasp* move up the chain to a VP or some rich brat with a degree in basket weaving who sits on the board. It's not so much needing everything handed to them on a plater as just needing someone to take the rap when the inevitable problem arises.

That said, I find Fedora runs fine on old hardware using a lightweight DE like the included XFCE. So I'm offended not to see my distro of choice on the list.

And yes, saying Micro$haft makes me a genius.