"Have a strong feeling there is going to be a cultural black hole where large segments of music etc lost in the post-naptster/post-piratebay world because it only existed on the artists machine, Spotify's servers and YouTube's servers."
That has already happened several times. Anyone remember silent films? Most of the scores were never archived, so most of the original music that went to those films is lost to history.
That was also because a lot of those scores were actually performed live, but yes, it has happened already and it keeps happening every day - tons of books, movies and cds are never reprinted because they are copyright-encumbered but not popular enough, and eventually their master documents are misplaced or lost... if it can happen to Kubrick, Dr. Who and Joy Division, it can happen to anything and anyone.
That has already happened several times. Anyone remember silent films? Most of the scores were never archived, so most of the original music that went to those films is lost to history.