It is indeed a great feature but how time-consuming haha :)

I inherited my music collection from my 20 years old limewire addicted self, so it’s a complete mess. I’m in the process of completing albums and using Picard to properly tag everything… 20 years of music collection…it’ll take me 20 more years!

Anyway, I guess it’s a warning for anyone starting to accumulate data: think about metadata, formats and data-management. NOW!