Non-integer scaling has been working fine for me for a few years now. I use Fedora + KDE, 175% on my 24" 4K monitor and 225% on 4K 15.6" laptop. I just had to

Non-integer scaling has been working fine for me for a few years now. I use Fedora + KDE, 175% on my 24" 4K monitor and 225% on 4K 15.6" laptop. I just had to manually increase the mouse cursor size, and in Firefox change layout.css.devPixelsPerPx to the scaling factor.