iOS/iPadOS is the only graphical OS I've used without constant bullshit performance issues affecting the UI (stuttering, pauses, unresponsiveness to input) and

iOS/iPadOS is the only graphical OS I've used without constant bullshit performance issues affecting the UI (stuttering, pauses, unresponsiveness to input) and with notably low input latency, aside from BeOS and QNX (back when they still offered free Proton desktop copies of that for hobbyist users). MacOS and very stripped-down Linux or BSD desktops are the closest I can get to that experience on the desktop, these days, and even those aren't terribly close to being as good.