>>54645920
Basically this.
Linux is used on computers that don't need to interface much with regular users. So the most common installations are probably barebones setups, that support servers etc.
Windows is very commonly used on consumers PCs, simply because they support a lot of hardware and commercial software. They also benefited from their previous market dominance from the late 90s, when PCs became a thing.
OS X is probably the prettiest OS, but it's not really the most capable in any way. And it runs on very specific harware. Everytime I log into OS X, I notice how Safari is still behind other browsers in so many ways, but hey, it looks so minimalistic and it loads fast now, but for what purpose.
The whole system seems made to first follow design guidelines and secondly functional guidelines. It's no wonder it's the favourite OS of designers, artists, etc.
So, yeah, OP, it looks smooth, but that's one of the few good things about it.