Oh yeah. Never allow iTunes to manage your music (there's a checkbox.) In 2010 it wiped out the metadata from about 3000 songs and decided they were all united

Oh yeah. Never allow iTunes to manage your music (there's a checkbox.) In 2010 it wiped out the metadata from about 3000 songs and decided they were all united by unknown. I tried a few autotagging libraries but had to do at least half of it manually. Sadly I haven't found a decent replacement for it.