A view from a professional audience and folk groupie.
A child of the '60s, I mingled the Trio, PP&M, along with Morrison, Hendrix and Joplin and lots of forgettable groups.
But I had Troll, somewhat older, lots more musical talent (not hard as I have almost none), not too bright, setting a good folk example. Back then heavy on irish and sea chanties, I remember. Did introduce me to the dulcimer and Jean Ritchy, however
Nostalgia occassionly lures me back. In retrospect, I look at a lot of the packaged folk groups of the time much like the old kitch art "standard" of Venus de Milo with a clock stuck in her stomach. The core disturbed by the tacky cliche but somehow almost bad enough to be good.