Ubuntu's version of GNOME X11 handles it pretty well. You can workaround it similarly in other DEs/WMs by mucking around with xrandr (I forget exactly). I have

Ubuntu's version of GNOME X11 handles it pretty well. You can workaround it similarly in other DEs/WMs by mucking around with xrandr (I forget exactly). I have an Nvidia card and last time I tried Wayland was just not usable. I also hate how at this point we have 3 choices for Wayland WMs compared to what is probably hundreds for X11. I did get frustrated with mixed DPI on Linux and just ended up replacing my 4K monitor with a 1440p one. What's also kinda sad and funny is that X11 has had from day 1 support for different DPIs on different displays. But most programs just ignore X11s DPI setting and assume it's 96ppi. It also conflicts with modern multi-monitor on Linux which essentially fakes one giant display so you can drag windows across. There is some drawbacks but if you config each monitor to be a separate X11 display with the proper DPI and use compatible programs like Alacritty it kinda just sorta works.