In 2024, with GNOME 45, Wayland, and 1.25 fractional scaling, regular DPI displays still look better than HiDPI displays. This is a photo of Discord on two laptops side by side.
The blurry one is the HiDPI display from Framework 13. The sharp one is a regular DPI display from Dell XPS 13. Both laptops.
The difference is even more stark in person.
Even the screenshots from the Framework are blurrier than the screen shots from the Dell.
The Arch Wiki gives good tips on what environment variables to set to make sure that your GUIs are running with Wayland native and not XWayland. I have a Framework and I don’t have any blurry text issues, and I’ve done all the settings in this section.
https://wiki.archlinux.org/title/Wayland#GUI_libraries