The death of Mary Travers will bring the inevitable reviews of the days when folk music was extraordinarily popular.
I was a major fan of Peter, Paul, and Mary until a cheerful group called The Beatles came along. [Listening to PP&M later, I was struck by the depressing tone of much of the music.]
Feel free to add to this list and consider: How many of these are still around?
Dave Van Ronk
Ian and Sylvia
The Kingston Trio
Bud and Travis
The Smothers Brothers
John Stewart (No, not that one!)