That’s one of the things I brought up in the post: that the transition is taking forever because Wayland was not designed to be a drop-in replacement for X11, the way PipeWire was for PulseAudio. That transition was indeed fast and mostly painless as a result. Really a model for how things should be done.
But Wayland was first released in 2008; I have a feeling if its authors could go back in time and do things differently to make the transition happen faster, they might. 