Spot on, for file system now it should not be a problem to have links in different places in hierarchy. You can have "favoriteSong.mp3" in catalogue with artist

Spot on, for file system now it should not be a problem to have links in different places in hierarchy. You can have "favoriteSong.mp3" in catalogue with artist name and use links to put it in catalogue with "ultimate super songs". But I think people are not aware of possibilities.