I just recently switched to Linux since I had some weird Windows issues I couldn't fix. I've tried to switch a few times before, but the main problem at some point was that I didn't have proper fractional scaling on Linux. And that alone pretty much made Linux unusable for me on my specific hardware.
Wayland fixes that, so that part is a huge improvement to me. Unfortunately this also limited my choice of Distros as not all of them use Wayland. I landed on Ubuntu again, despite some issues I have with it. The most annoying initially was that the Snap version of Firefox didn't use hardware acceleration, which is just barely usable.
Yeah, fractional scaling is absolutely the one thing that I miss on Linux. On X11 it's too slow and laggy. On Wayland I have... Wayland issues.
I don't entirely love MacOS (mostly because I can't run it on my desktop, lol). But it does fractional scaling so well, I always choose the "looks like 1440p" scaling on 4K resolution, and literally every app looks perfect and consistent and I don't notice any performance impact.
On windows the same thing, except some things are blurry.
On Linux yeah I just have to bear huge UI (x2 scaling) or tiny UI (X1) or live with a noticeable performance delay that's just too painful to work with.
It seems wayland has fractional scaling, but it is recent, but the bottom of this is high DPI handling should be handled at the GUI toolkit level. Compositor scaling is just a dirty fix for legacy GUI apps.
Wayland fixes that, so that part is a huge improvement to me. Unfortunately this also limited my choice of Distros as not all of them use Wayland. I landed on Ubuntu again, despite some issues I have with it. The most annoying initially was that the Snap version of Firefox didn't use hardware acceleration, which is just barely usable.