Tonsky, the creator of the popular 'Fira Code' monospace font, has a great blog post about monitor DPI and font rendering. A big section is on just how terrible font rendering and display scaling on a modern Mac really is.

https://tonsky.me/blog/monitors/

I don't use a mac but hop on other people's from time to time. I see nothing special there compared to my ~250 dpi ubuntu laptop.

I run Arch on a Surface Pro 7, (ironic, I know), which has a HiDPI display and the experience is good for me under GNOME, even fractional scaling is supported.

One thing to keep in mind is that Windows/Mac/Linux do render fonts differently - they may not look identical to macOS out of the box, but there's a lot of configuration options (if you want to play with them) to get them to look the way you want.