Dude. I started this process in January. It took me 3 days to get through "Compilations." Fortunately, all of my shit was on one computer and I needed to move it to another but even iTunes fucks with its own files. And then I let TuneUp rape it a few months ago thinking it would save me time (NOT). But yeah. Getting it so that only classical has composers, that there are only the 23 genres I believe in, that only multi-disc albums list multiple discs, and that all albums have ALL THE SONGS ON THEM legitimately took until February 28. I bought a $2300 NAS simply for backup. And I bought it because while all of my media is available elsewhere, I recognized that I spent a shit-ton of time getting my 1TB sample library to have my metadata on it. In an era where you can torrent just about anybody's stuff, having it beat to fit and painted to match your library counts for a lot. God speed.