Windows support is kinda funny, it works fairly well normally but has all kinds of strange bugs. For example, if you switch in/out of full screen windows will just randomly move between displays. There are quite a few inconsistent scaling bugs.

I haven't played with xrandr multidpi, although I hear a lot of complaints about it. I've tried wayland, but I wasn't keen. I was very frustrated with sway (twm), which advertises itself as a drop in replacement for i3, but does many things differently. The fractional scaling on wayland can be blurry. There are still loads of bugs.