The Grateful Dead is so old! They started in 1965 in California.
I didn't realize that started that long ago. I've never been a big fan of their music, to be honest. 
Lenny Kaye said that their music touches ground that most other bands don't even know exists.
Well, that is quite an endorsement. Jerry Garcia was one of the original members, right? I remember when he died. 
Yes, and they were the pioneers of the jam band world thanks to their diverse sound.