Man, I’m getting old. I grew up loving ELP, Yes, King Crimson and Zappa, then became a Dead fan when I was into my twenties. Never saw them live, but you can spend literally weeks watching concert footage now because they encouraged their fans to tape them.
Thousands of hours of live music. It’s impressive.
With more to “tapes” to come...
“What’s Become of the Bettys? The Fate of the Long-Lost Grateful Dead Soundboards”
http://www.relix.com/articles/detail/whats_become_of_the_bettys