I actually have a follow-up to my earlier post. I have been using Plasma with Wayland on my 3090 and it works more consistently than on my laptop with a 1650.

Wayland is basically required for high framerate gaming if you have a multi-monitor setup because it allows multiple refresh rates across all the monitors as compared to X which locks it to the lowest value.

I’ve been able to play World of Warcraft and Cyberpunk 2077 at higher and more consistent frames than running Windows, probably because of all the dumb bullshit in the background that does not exist in my minimal Arch install.