The OS is less the stage manager, and more the venue itself. Imagine if the Sydney Opera House or Carnegie Hall looked "inoffensive" rather than majestic.
Opera House had (possibly still have, I heard they did a redecoration [1]) very big issues with acoustics. It's bad functionality directly caused by aesthetics.
> Imagine if the Sydney Opera House or Carnegie Hall looked "inoffensive" rather than majestic.
Doesn't sound like a big problem. Some of the best plays and operas I've seen have been in bland concrete boxes, portakabins, round the back of pubs.... Of course all else being equal I'd prefer a building to look good, but good stage visibility and acoustics beats a flashy building every time.
It's definitely the stage manager for me as a Linux guy who likes to rip the WM out of whatever DE is running and replace it with i3. Different strokes!