It's a different playing field: OSX has to support a small handful of chipsets, and if it doesn't work then manufacturers will step in. Linux has to support a boatload of crap silicon, and if anything doesn't work, manufacturers will just shrug.

Add to it that every Linux distribution has its idiosincratic approach to low-level subsystems, and you have a recipe for problems if you work anywhere higher up the stack.

But don't worry, eventually the problem will be solved the other way around: there will be a systemd-DE, and everyone will use that. /s