That has always been my main criticism about wayland: it's actually vaporware.
It's just a spec (and not even a complete one) that says "now, you go do our work and implement all this". So everyone has to go and do their own thing, which is the usual big corpo strategy to kill small corpo and/or FOSS. So I wonder why don't people see it. Pulseaudio, wayland, systemd, all came in at about the same time as the "microsoftism" infection in Linux development.
From what I recall, for the first 5-or-so years there was not even a reference implementation (and I don't know if that is still the case, but do would expect it is).