I think the KDE developers in particular have done a great job of pushing Wayland forward and getting features that people want and need added as new protocols. KDE feels a lot smoother and more responsive when using Wayland than when using X11, and by this point most stuff has been updated to work properly on Wayland so I don't notice any breakage or missing features in day-to-day usage.

> Moving forward with a single code path going through Wayland is going to allow us to bring new performance improvements, memory optimisations, and brand new exciting features throughout Plasma.

I think the blog post would have been better if he had some specific examples in mind that he could have shared here.