I got a 5 year old Lenovo Thinkcentre for free and tried multiple desktops. The only desktop that had great scaling at a 4k screen was KDE. Gnome was okay with 1x or 2x scaling, but 1.3x ... big nope. Did not work out, performance was very bad.

With the end of Windows 10 support, I installed KDE Neon on my parents computers. Works fine, they can use it. Even on the Surface Pro 5 touchscreen, KDE works great.

In the past I was using Gnome (or Ubuntu's Unity) and never was a fan of KDE, but right now (especially because of the great 4k scaling), I really like it.