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.
Soulseek is the most popular now. It’s peer-to-peer on a different level than torrents, you download from a single other user, which is a little more finicky than connecting to a swarm. But there’s a lot of music available there.
for decades now