We are under an article which tells you that you can have problems with Wayland and hiDPI screens. And for example I’m one of those people, who uses X11, because Wayland failed on many levels, like buggy video playing, crashing while changing monitors, or simply waking up my laptop with an external monitor, and I didn’t give more than a few days to fix these (cheers to the author to try this long), so I went back to X11. Which is still buggy, but on a “you can live with it level” buggy.
Btw, everybody who I know, and I too, changes the font size, and leaving the DPI scaling on 100%, or maybe 200% on X11.
You can scale down from a higher resolution to make the UI perceptively the same size. You can do this with xrandr --scale OR for example the GUI in Cinnamon on Mint after you check "fractional scaling" under X mind you.
I have a setup with a high DPI monitor mixed with a normal DPI monitor and KDE over Wayland just works fine. The only issue that I found are with Libre Office doing weird over scaling and Chrome/Chromium window resizing his window to the oblivion.
Btw, everybody who I know, and I too, changes the font size, and leaving the DPI scaling on 100%, or maybe 200% on X11.