I moved to my own cobbled together Compiz standalone shortly after Gentoo devs forced the issue with KDE4 (the second or third time). I was really ticked at the KDE devs -- and separately, the Gentoo devs -- at that point. Basically, I was used to the way I had things set up and I didn't want anyone compelling me to make changes I didn't want to make for reasons that ultimately had nothing to do with me. I didn't care what these people's vision of the future was, and didn't understand why they were "screw"ing the users who had supported KDE for so long.
I knew if I switched to Gnome, the same thing was going to happen, and soon. Of course, now the compiz packages I use are getting removed from portage, so I made them local packages. When the deps change again and break compatibility, I can look forward to a new round of hell. But either way, it's my responsibility--I can complain to myself about all the bugs that I've failed to address. Puts things in perspective. I understood, but didn't fully appreciate just how complicated this crap is, but now I just couldn't imagine any screwing involved. Screwing implies some satisfaction on at least one end!