Dollypop, I think that's very true of almost any artistic collaboration. Great art sort of happens due to some divine chemistry. Even if the same people are back together, the same magic might not strike. I think the question of, "Well, what made this so great?" is always hard to answer because if they had waited two months or come in a different year, the show could have been a miserable flop.
Some people paint, some people sew, I meddle.