There's nothing wrong with tags for music libraries - just that ID3 and the tooling around it sucks - especially genre handling, the artist/performer distinction and the inability to handle my own arbitrary grouping that doesn't correspond to any release information.
I love apps that allow me to easily switch between using tags and using my own folders.
The rather excellent Foobar2000 for Windows has a library view that lets you switch between folder structure and tagged properties (album, artist, genre etc)
I love apps that allow me to easily switch between using tags and using my own folders.