Maybe Wayland is extensible, but if the main desktop compositor (i.e. Gnome) don't implement these, it is as much as useless. And it seems that Gnome very much

Maybe Wayland is extensible, but if the main desktop compositor (i.e. Gnome) don't implement these, it is as much as useless. And it seems that Gnome very much "designed out" some features such as window positioning, window icon, and so on. (We're talking about user's desktop, not custom car entertainment compositor)