MacOS doesn't handle HiDPI screens that well either. The most common and affordable high res monitors are 27" 4K monitors and those don't mesh well with the way macOS does HiDPI. You either have a perfect 2x but giant 1080p like display or a blurryish non-integer scale that's more usable.
And god forbid you still have low DPI monitor still!
Blows my minded that a 4k 27" monitor that was $500 a dozen years ago is still near top tier now.
5k has been surprisingly stagnant.
At some point additional resolution is a dimishing return. The human eye has limits.
5K 27” looks usefully better than 4K 27” to my middle aged eyes.
I’d prefer that to not be so, because 5K panels are so much more expensive. But in a side by side comparison it’s very obvious.
But the market has spoken: a quality 4K display is very good, certainly good enough, and the value for money is great.
I’m ok with spending more on a better display that I spend so much time with. The cost per use-hour is still very, very low.
We're approaching that point but are not there yet
You can adjust this in settings.
Adjust it to what? Making a 4K monitor look like 1440p (or a non-1080p or 4K desktop) ends up with a non-integer scale on macOS AFAIK. They also completely tore out subpixel font rendering for low DPI displays.