It does for any app that can't scale; all modern OSX apps can scale natively. I've been using that trick for integer-like scaling for years to deal with fractional scaling while preserving the quasi-aliasing ("crispness") of the source image.

However, Wayland does not prescribe any method for non-integer scaling. Any Wayland WM could choose to do the same thing, and it would be hardware accelerated essentially for free.

Both X11 and Wayland WMs typically don't use this trick, and neither does Windows.