[dman]

Things like dwm / i3 handle this much better since there isnt any UI to scale. You just set the right font size and you are good to go.

[majewsky]

HiDPI support is more than setting a font size for the task bar. The tricky part is getting application windows to rescale their UI as they're moved between screens with different scaling factors (e.g. from a notebook screen with high DPI to a projector with low DPI).

[dman]

That was kind of my point - the more starkly minimalist the workflow the easier it is to make it pixel perfect and look exactly as you intended.

[diffeomorphism]

So the parts of the UI that are i3/dwm scale. Everything else like email, browser, image editing, applications, the stuff that actually matter, doesn't.

Sure, if you only ever need a text editor you don't need to care about scaling anything but fonts, but that is not the case for most people and unrelated to which WM or DE you use.