I once tried bringing this up in the discussion, but I believe this protocol still works with some sort of "logic pixels" abstraction. And there is concern abou

I once tried bringing this up in the discussion, but I believe this protocol still works with some sort of "logic pixels" abstraction. And there is concern about rounding. If rounding / scaling artifacts are avoidable, this is fine. On the other hand if this stuff occurs in practice like with macOS (at least at one point, with the 2x render and downscale), this is totally fucked. Wayland is much more low level than, say, CSS. So I see zero problem if the scaling factor can instead be a black box which applications are familiar to treat however they like. This is how "*.dpi: 120" in a .Xresources file works, for example. Not all applications might be able to support fractional scaling, but those that do can do it perfectly without any risk of scaling artifacts. This was repeatedly rejected for reasons that I don't understand.