> I can make it do basically anything I want

X11 can't do high refresh rates every time that I've tried to do so.

It runs just fine at 165 hz for me. Given that xrandr and CRTs have been around for a while, and both have supported high refresh rates for a long while, something seems fishy here. Something is probably at fault, but it's not X11.

X11 can't do different hz on different screens. If you have a dual screen setup where one screen is 165 hz and the other is 60 you're SOL.

Works fine for me with 144/120 with the second as 60.

X11 can't fix climate change.

Huh ? It did in 2000.