Post by C.Z.
Dylan's move to electric singlehandedly created a whole new genre of music, out of folk music and and rock 'n roll. Not that he evidently intended to do that. A bit more than a marketing move, I think.
I'm afraid electric folk existed before Dylan, though mostly in Europe and without a distinctive genre name. I know; I was listening to it, and later playing it. Dylan was simply taking up another coming style, as he did with so many. What he did do was polarize the two into different schools, with left-inclined oldies like Ewen McColl both distrusting the commercial nature of the change and its distancing from genuine folk tradition. That's not to deny Dylan was an influential artist, of course, in his way and within his limits; but in the context of the Wagner comparison, he wasn't that kind of pioneering creative original.