Linux

HiDPI and per-screen scaling work well on my Wayland KDE Plasma install, too. The addition of the word "even" there is telling, though, and if I had chosen to stick to a different combo of distro, DE and compositor I would be annoyed by that on the daily. And that would be an issue.

That's what I'm trying to impress here. You can tinker until you find a setup that works for you, I'm not questioning that. But "I've solved all the issues over the past decade of tweaking this setup" is not the same as "there are no issues", and it's important to acknowledge the difference if you're going to be out there recommending that every normie user shifts to Linux.