It is useful but limiting. The point of the logical tree is to index files, but a tree is a subset of more powerful indexing methods. Relational and graph struc

It is useful but limiting. The point of the logical tree is to index files, but a tree is a subset of more powerful indexing methods. Relational and graph structures come to mind. Incidentally, databases exist to marshal indexed data so that it's not visible or managed by the file system. This seems like something a non-hierarchical file system would supplant, which would allow for interoperability with file-oriented tools.