alt Hacker NewsFractional scaling is now supported by major toolkits and compositors.
https://wayland.app/protocols/fractional-scale-v1
Also, I wouldn't hold the rendering quality of macOS as a high standard at all, since all it does is render at a multiple and then downsample, wasting energy and introducing blurriness.
Perhaps it's subjective, I have multiple portable displays including a e-paper monitor and I find that for low resolutions the HiDPI in the macOS produces more legible text in those monitors.