Huh? I've been running a 2x/192dpi Linux/X11 laptop for a couple of years, and the experience has been near perfect. Hands down better than on Windows. Some DEs

Huh? I've been running a 2x/192dpi Linux/X11 laptop for a couple of years, and the experience has been near perfect. Hands down better than on Windows. Some DEs even detect the panel DPI and configure toolkit scaling automatically. Firefox and Chrome have been two of the most well-behaved apps, especially since they switched to GTK3, but it's not just GTK3 that is well-behaved, Qt5 is as well. Since most apps I use are Qt5 and some are GTK3, they all get crisp HiDPI rendering automatically from the toolkit. So I'm not sure what you mean by "HiDPI on Linux is pretty much non existent." Maybe it gets worse if you need fractional scaling or displays with different scaling ratios, but these seem to things all platforms are struggling with. Microsoft only made built-in apps like File Explorer per-monitor-DPI aware in Windows 10 1703 (released a year ago), and macOS doesn't attempt fractional scaling (eg. 1.5x, 2.5x, etc.) at all.