For gaming as long as it's doesn't shipped with malware AC you can play it just fine, idk for coding I never written a single line of code ever since I switched to Linux 2 years ago but I heard from most professional coder said Linux is perfect for coding (maybe not if you code softwares for windows).
I mostly neutral on KDE vs Gnome thing, but after I got into theming my computer more I started to hate how Gnome handle its theming capability (confusing, messy, if I fix one thing something else break) while on KDE it has menus dedicated to colors scheme and general looks and feel
Thanks, I've been enjoying NK and Synthwave musics a lot lately