Last I checked, for fractional scaling, Apple was 2xing, then using the GPU to resize down. Could have changed by now though. Been a while since I took a look.
A buddy of mine once had a 4K monitor and was scaling it to 1.2 on his MacBook. Took him a while to realize that's why his fans were revving up all day long. haha
Seems like just telling apps to draw to a larger window is the way to go, which is why I don't understand why Apple and Wayland do it by scaling down an integer. Gotta be a good reason.
