> Ubuntu doesn't much like the 4k screens This is not really Ubuntu's fault, but mainly a problem with GTK2. Everything based on GTK3 scales quite well nowaday

> Ubuntu doesn't much like the 4k screens This is not really Ubuntu's fault, but mainly a problem with GTK2. Everything based on GTK3 scales quite well nowadays, the same is true for QT. Unfortunately, the Gimp and Inkscape are two notable applications which have not yet been ported to GTK3. Other than that, it's only the console which is not usable out-of-the-box.