ex-MacOS SWE here. Subpixel antialiasing is obnoxious to implement. It requires threading physical pixel geometry up through multiple graphics layers, geometry which is screen-dependent (think multi-monitor). It multiplies your glyph caches: glyph * subpixel offset. It requires knowing your foreground and background colors at render time, which is an unnatural requirement when you want to do GPU-accelerated compositing. There's tons of ways to fall off of the subpixel antialiased quality path, and there's weird graphical artifacts when switching from static to animated text, or the other way. What a pain!Nevertheless there's no denying that subpixel-AA text looks better on 1x displays. Everyone notices when it's not working, and macOS will look worse without it (on 1x displays).
Gast
