i have seen music libraries that are just a flat list of every album in one folder.
i have seen albums with various EAC/AccuRip logs and shit in them but are inexplicably missing several tracks
i have seen music libraries organised by genre instead of artist
i’m pretty sure i once found a person whose music library had a separate folder for every single flac file
but the real worst thing is when it all goes into musicbrainz picard and then it sets the Sort Artist names like someone who was born a hundred years ago would (hell yeah i love to listen to Twin, Aphex and Cicierega, Neil. catch me blasting those Fish, Reel Big and some Fire, Rhapsody of. love me some Project, The Octopus)