Even still, they are very hard to work with when compared to X11.

Fvwm people are very smart and have been developing fvwm for longer than Linux have been around. From what I understand and have read, bring fvwm or creating a fvwm clone on Wayland is near impossible. Far too much work.

So we will really end up with "pigs" like Gnome3, KDE or a slew of tiling environments. None of the cool WMs like Windowmaker, fvwm, dluxbox, twm, ctwm, vtwm ....