Both my desktop computer AND my laptop have one thing in common: neither of them is a tablet. And Windows 8 as is is ONLY oriented towards tablets.
A lightweight OS oriented in low power usage and touch-based controls, which just happens to still maintain some sort of classic experience because they couldn't be arsed to remove it the way they removed other perfectly functional features, is not the OS I want to use.
Windows 9 may or may not be good enough to get into my computers. We'll see.
The trick for me to get used to Office 2007/2010, was to forget where things used to be, and search them where they are supposed to be. Then everything clicked into place, and now I like the UI quite a lot.
Note that I don't mean the SAME UI works for everything. That's a mistake some people seem to make. Different kinds of software are best with different interfaces.
That may be an option. I will have to test it before I give up on Firefox completely, although I fear an add-on that changes so much may break things in the long run.
I did test it some months ago, when I first discovered Australis. Back then it lacked many details that made me prefer to downgrade to a more stable channel, but I will try it before I completely dismiss Firefox. If it even really happens, because as much as I dislike getting things shoved down my throat, the alternatives feel even worse. In them, there's no customization at all.