Napster was people sharing files. That's a crime! But now it's corporations so it should be legal.

Well, I think the main catalyst here is that corporations need to pay creators, etc... Napster cut the middleman, hehe.

Which was never legal in the first place, but it was great because it liberated music and content to the masses. It was the necessary precursor to what is now Spotify and the like, instant access to billions of songs. The music industry didn't like that (Napster & co) because they wanted purchases and to get paid every time the music they owned was played.