[lproven]

> MacOS have always had the best font rendering on HiDPI screens and also the worst on Low-DPI.

No it hasn't.

Maybe to you "always" means "since 2014" but if so that means you are very young and you should not generalise from that.

I've been using Macs since 1988 and Mac OS X since 2001 and it used to be great on SD screens. I used to use Safari on Windows XP because its font rendering was so much better than the built-in Windows Truetype renderer.

This change is new and recent.

It is absolutely not "always".