Seems to me that what is needed is <i>consistency</i>. A hierarchical file systems represents something metaphorically &#x27;physical&#x27;. A tagging system seems to me to be too ad-hoc, and therefore untrustworthy.<p>If I know I left a file in a folder, I know it will always be there. If I tagged a file with some sort of mnemonic, then it&#x27;s on me to remember what burst of inspiration told me to tag it as such.