In case you hadn't considered the alternative position, I get nervous deciding where something should "Really" be when that's based on a number of things, e.g. there's a multitude of hierarchies I could pick when organizing a music collection, and none is inherently correct over the others. Some things defy a hierarchical structure entirely. (I hate having a "Various Artists" folder, and those albums not being visible under each artist. I have considered symlinks, but too often software treats these as multiple copies.)
I can avoid that by having my files in a content-based-addressing pool with metainformation.
