I HATE the whole idea!
I used to walk to a shop buy a CD with a HARD copy it was MINE I paid for it! a physical copy I had controll over.
Then we had MP3's with that lovely DRM removed to let us do WHAT WE WANT and had a PHYSICAL file on my laptop or pc it was MY FILE.
So what we saying now?
Upload all YOUR music your PAID for back to Apple or whatever company running it so they have the whole controll to pull it all when they want!
No copys, no files, all on the server and it dont stop there it will be personal stuff soon eventualy everything cloud based and your trust in the company to keep this all safe!
NO WAY I'll stick to my few terabyte hard disk and stream it from MY PC not THERE servers!
Never heard of mainframes? Computers are just coming full circle, that's all, with the internet replacing local connections.