> On the software side, acessibility aside, there are a lot of VNC and other remote-X setups out there with no viable replacement in sight (yet).

I've been using wayvnc for probably 5 years now? Works great. Sway can output fine to virtual-crtc out for headless mide; I expect other compositors can use this part of your GPU too. If you really desperate & your Wayland server just can't for no reason, get a DisplayPort dummy plug for $15.

I know less about others but krfb and gnome-remote-desktop are both there. KDE is recently kicking off a bunch of work to make sure their login manager is remote friendly too.

> I do not appreciate when it turns into tribalism, forcing of monoculture and insisting "X11 is deprecated".

Most of the devs doing X11 agreed en masse that it was at a dead end and not worth caring for anymore. It's not tribalism. It's technics.