I still have subpixel antialiasing on when using a 28" 4K display. It's the same DPI as a FHD 14" display, typical on laptops. Subpixel AA makes small fonts look significantly more readable.
But it only applies to Linux, where the small fonts can be made look crisp this way. Windows AA is worse, small fonts are a bit more blurred on the same screen, and amcOS is the worst: connecting a 24" FHD screen to an MBP ives really horrible font rendering, unless you make fonts really large. I suppose it's because macOS does not do subpxel AA at all, and assumes high DPI screens only.
But it only applies to Linux, where the small fonts can be made look crisp this way. Windows AA is worse, small fonts are a bit more blurred on the same screen, and amcOS is the worst: connecting a 24" FHD screen to an MBP ives really horrible font rendering, unless you make fonts really large. I suppose it's because macOS does not do subpxel AA at all, and assumes high DPI screens only.