I agree that Denver was replaced in the 80s,but calling him emotionally"flat" in the 70s was not correct. He would get on the tonight show and say"far out" about a hundred times and laugh a lot. I think the original Denver was a real and talented person.
That's good to know. All the footage I saw of him on this particular TV biography of him just profiled him saying stuff in this completely flat, monotone style - I'm glad there was some spark in one of the Johns/Fohns!