I've been on the brink of installing KDE many times over the years. What held me back was that screenshots always displayed bulky window decorations which I have no use for on a 13/14" notebook. Also, for space efficiency, I want global menus period. I think Ubuntu pre-18 with Unity got a lot of things right - a lean UI getting out of your way and yielding space to actual apps. I can do without the collection of desktop apps for either Gnome or KDE - on Gnome the file manager is particular anemic, on KDE it seems too Windows-y for my taste. And I don't use Gnome's mail app or video player but rather "best-of-breed" apps like Thunderbird and VLC anyway. So I guess I'll be looking at lightweight DEs/non-"DE"s going forward (but I'll give KDE a try for sure).

It's sad because gnome worked very well for me so far, and I've actually seen Ubuntu becoming the mainstream choice for freelance dev teams at many places over the last couple of years. I do feel guilty to criticize other people's hard work given for free to me without constructive criticism but as far as I'm concerned gnome shoots for a future and audience of desktop users that just isn't there when IMHO the goal should be to preserve what precious free desktop apps we have and not making app development any more difficult or gnome-centric.