Seeing the Pythons without Graham is like seeing the Beatles without John.
That was always the reason Cleese gave (or something similar) for why there would never be a reunion. They might work together on projects, but they didn’t think that they could do a Monty Python reunion. (That was then, of course.)
True but I bet Graham is smiling when he sees the name of the show. “Monty Python Live (Mostly) One Down, Five to Go" that is sooo Python! It makes me giggle each time I read it!