Unless I’m mistaken, X has never had proper color management support in the first place.

When is the last time you tried a Wayland DE? I can’t speak to them all, but Plasma for one has been in really good shape for basically everything a typical user might want to do with it for around a year now.

X11 versus Wayland isn’t some kind of holy war; Wayland was specifically designed as a successor protocol to the largely cobbled-together X and is objectively superior to it in most ways outside of accessibility.