I appreciate the blessing.
Since there is NO UNIVERSAL WAY to catalog a library, iTunes will do for me for now. You do realize that iTunes places files into a directory structure with the Artist name (or collaboration) and then sub directories for Album names, don't you?
But, that only gets you so far, since for me, additionally categorizing by decade or genre or some other element helps a lot. If I do that by using the file system, I can only place a song into 1 category without copying it, since Windows and the Apple file systems don't really like links as well as say Linux or Unix.
SO .. how to do that? Well playlists of course ... and what playlists are easily and automatically readable in most apps? Well iTunes of course.
Simple and dare I say, "Universal".