I've used Mint for a long time. Extremely solid, stable and simple. In the last three months I've been on Arch (through Omarchy) and it's also very stable and so powerful. Everything just works. I have a pretty beefy computer and even my favorite game of all times (Path of Exile 1) runs fantastically on it.

XWayland runs on top of Wayland, and is a way for X11-only applications to still work. It does not run inside a native X11 session.