Wow, that's seriously disappointing.

As of recently, I have a mixed 1920x1200 and 4K setup on my home desktop, and 1920x1200 + 2560x1440 setup on my work laptop. I was very interested in what I'd heard about Wayland supporting per-monitor scaling and hoping to move over whenever KDE's Wayland support stabilised.

Well, I guess I'll still be doing that on my work laptop with its Intel graphics... here's hoping AMD does better for my next desktop GPU upgrade.