I have a folder of MP3s, some of which date back to 1999, just a few years after the format was popularised. Most of them have utterly terrible names (think RIDEONAM.MP3). I think at this point they might even survive the heat death of the universe. And they’ll still be terribly-organised.
I used Musicbrainz Picard to sort out my old library. I was honestly impressed with how much I could find all the data for, but it did need help for a lot of things.