&gt; You have to realize though that this software doesn&#x27;t take away your heiracichal system, it just gives you another way to look at it.<p>I think that this is extremely important.  You mention iTunes, which does its best to pretend that there&#x27;s no hierarchical file system underlying it.  There is, of course, but—ugh, one look at it will make you long for a totally flat file structure.<p>I think that it&#x27;s important that any hierarchical-file-system &#x27;killer&#x27; actually not <i>replace</i> (or render meaningless), but only <i>supplement</i>, the often-useful hierarchical structure; and it looks like this tool does that.<p>(In case that looks like an argument, let me say explicitly that I am agreeing with you.)