I’ll just add that it is much better than fractional scaling. I switched to high dpi displays under Linux back in the late 1990’s. It worked great, even with

I’ll just add that it is much better than fractional scaling. I switched to high dpi displays under Linux back in the late 1990’s. It worked great, even with old toolkits like xaw and motif, and certainly with gtk/gnome/kde. This makes perfect sense, since old unix workstations tended to have giant (for the time) frame buffers, and CRTs that were custom-built to match the video card capabilities. Fractional scaling is strictly worse than the way X11 used to work. It was a dirty hack when Apple shipped it (they had to, because their third party software ecosystem didn’t understand dpi), but cloning the approach is just dumb.