I think it is. Directory hierarchies are trees, tags are graphs. Trees are great when you need to optimise the physical retrieving time, but don't map well to s

I think it is. Directory hierarchies are trees, tags are graphs. Trees are great when you need to optimise the physical retrieving time, but don't map well to stuff like pictures. For example, tags of who is in the picture are way better than making folders by person. Same thing for places.