Not counting the Steam Deck, since KDE isn’t actually turned on while you’re running games.
Normally I’m a Gnome guy, but I’m building a tiny low power portable computer and wanting to keep resource utilization low, so I’m investigating other options.
KDE Plasma xorg. I use discord streaming quite a bit with friends so Wayland isn’t an option and I’m not using a third party discord client since that’s against discord ToS.