I think it's way too early to say is this kind of models good replacements of traditional file systems since we are so used to work with hierarchies everywhere and tooling is very young if any.

I think simple operations remain still quite simply but we need to alternate those a bit. For example "delete everything in here" may not be very clear thing but "delete these files globally" and "unlink these tags" are still simple concepts. What tags are offered to be unlinked for what files is just UX decision where is multiple quite ok answers. For example if we browse files as tag stack we may delete first one or ask how deeply we want clear stack tags.