It is trivial to write a desktop-agnostic screengrabber program in X11, but impossible to do that in any Wayland-like display server since by definition you nee

It is trivial to write a desktop-agnostic screengrabber program in X11, but impossible to do that in any Wayland-like display server since by definition you need to integrate it with your display server (e.g. Gnome's, KDE's, etc.). Also for example Gnome's Wayland display server integrates a shitton of garbage into the display server process itself (e.g. a Javascript interpreter), and a crash in any of that code brings down the entire display server with all your windows.