I am guessing that people complaining about Wayland do not care that technically it is just a specification that is "much better" or "more lightweight" than X11. What they do care about is that Wayland is being forced on them before it works on the same hardware where X11 works correctly and X11 is being removed which leaves them without working system. If you go by what is lightweight than just drop all GUI since text console is the lightest of all user interfaces.