Are we talking about Wayland or X11 here? Because like the article mentioned, Wayland is now 15 years old and still sucks. Sure sounds like the Wayland design is untenable.
Wayland might reach feature parity in 2, 5, 10, or 20 years, and I'm fine waiting, because while X11 can kinda work well now, its archaic design with 10 levels of hacks will likely make it extremely hard to support new needs (it already struggles with some existing use cases).
People dragged their feet on Wayland support for at least 10 years.
The Wayland developers have limited manpower. Obviously it would take a long them for them to get Wayland to reach a critical mass when there wasn't support from the community.
Sort of feels like a self-fulfilling prophecy.