Same, been using an AMD card since building a new PC a few years ago and its been completely smooth sailing. My spouse also built a new PC at the same time but decided to go nvidia instead and has had constant problems (now regrets not going AMD as well) and has yo regularly downgrade the driver and/or kernel just to have a working system or games that don’t have things like vertices explosions.

ElementaryOS (Pantheon desktop)

Everyone here sorta answers the questions but not entirely. So KDE started back in the 1990s as K Desktop Environment as a play on the Common Desktop Environment. The K was originally suggested as standing for Kool buy I guess others in project didn’t think that was very kool and it was left officially as just K.

As to why Plasma - when KDE 4 was released, “Plasma” replaced Kdesktop shell and whatnot and was named Plasma because plasma evokes dynamic fluidity like plasma or some such lol. Unfortunately I can’t find anything easily on the interwebs that shows how it got it’s name :/

References:

• https://kde.org/announcements/announcement/
• https://timeline.kde.org/