I assume you haven't used both GNOME and KDE on a high-DPI monitor, because KDE's support for it is certainly not better. Qt themes don't scale, web views don'

I assume you haven't used both GNOME and KDE on a high-DPI monitor, because KDE's support for it is certainly not better. Qt themes don't scale, web views don't scale, icon, window, plasma panel, etc sizes need to be configured independently of font DPI, some applications just fritz out at high DPI font sizes. I've tested both 4.13 and 5.3, and haven't noticed any significant improvement in the latter. I'm a fan of KDE, but on my high-DPI laptop, I'm using GNOME purely because its "hackish" solution does work a lot better.