This is what we already have, but the problem is that hierarchical browser -> filesystem is a lossy process and you have to continually reindex the filesystem t

This is what we already have, but the problem is that hierarchical browser -> filesystem is a lossy process and you have to continually reindex the filesystem to maintain the browser. If the hierarchy is first-class and the files are derived, this is less of a problem because the source of truth is the same shape as the conceptual structure of the environment.