Dear Eli,
I don't think Glen is a troll since it was recently confirmed that all trolls live here in Russia :) Simply his task is fairly complicated.
Let us be optimistic, I personally use two computers under Fedora 21, 20 and two under Fedora 19. The latter two work perfectly, so I intentionally don't upgrade them, except for custom installations of up-to-date Firefox. I'm sure we have to praise fates that such a thing as KDE does exist and
that we aren't looking at strange Windows' GUI and don't spend money on
good MAC machines. We just should wait a bit till things settle, right?