I think I prefer the plan9 approach of "everything is a file/filesystem" rather than the unix "everything is a file" as typically seen. Actual usage of files, filesystems and namespaces under plan9 was more consistent than the file approach under linux. It was a lot of fun playing in plan9.

Regarding the video, of the three examples the windows approach was shown as more succinct. I thought the linux version was messy. The mac version seemed overly complex. Whether these were actually representative is another matter. I can't say how but I'm not convinced - there seemed to be some artistic license / suspension of belief required.

The remainder seemed to be meandering but I sense you had to be there.