[lagadu]

I disagree with your second assertion: if the streaming services go bad, the alternative isn't paying for all the music you've been paying for again; the alternative is pirating it all of it for free.

That's the beauty of the services: they have to compete with free and to do that they have to provide a superior enough experience to the user. If that ends, the music industry is the loser.

[nixpulvis]

Your solution is explicitly illegal and not always possible. Not all music is so easy to find over time.