I see what you’re getting at. It’s a matter of perspective, I guess.
If you presented someone with a list of features from two similar but different pieces of software, they wouldn’t say software b is broken because it’s featureset is different from software a, right? But I acknowledge it’s not that straightforward. It’s more like telling them software b is going to replace software a that you’re currently using, get ready to say goodbye to some features.
I still don’t consider wayland broken, but I understand argument that it is.