Malte, your habits sound more or less similar to mine, although your collection dwarfs mine. Almost 8000 albums? Enough for three lifetimes.
Yeah, a lot and surely too much… and not all music as mentioned. Probably also some orphaned entries as Apple Music/iTutnes makes it unnecessarily hard to find/cleanup these. And probably I should remove a few things I haven’t managed to listen to or will never again… But since digital space is cheap…