1 point
My guess is that kde is more “familiar” for gamers coming from windows… It looks more like windows than gnome
1 point
Fair enough, though Gnome does resemble mobile interfaces like the ones in Android (at least I think so, I’m going to get grilled for this aren’t I?), which would make more sense in what essentially is a mobile device that should have mobile touch based navigation due to lack of physical keyboard and a proper mouse.
KDE may look like windows but it also functions way worse than Windows on a touch screen device, at least most windows devices have a keyboard and mouse but the SteamDeck requires you to use an external one, which may or may not be available.