> Wayland + VRR is even better.

On AMD hardware, VRR works fine on xorg and has for quite a long while now... so long as you have either a single active monitor (or maybe the restriction is just "don't have any active non-VRR monitors"). [0] I don't have Intel or Nvidia hardware so I can't test, but the Arch wiki says that they both work fine with VRR. [1]

The only Wayland feature that I've heard be commonly touted that xorg lacks is HDR support.

[0] I don't know which is it because I haven't bothered to go out and buy a second VRR-capable monitor.

[1] <https://wiki.archlinux.org/index.php?title=Variable_refresh_...>