I mean, Side Show was completely unable to find audience not once, but twice in under two decades. It's just not a good show.
I think The Visit could find an audience, but the Broadway premiere had an ad campaign that was vague on any aspect of the show except Chita. I don't particularly care for the show, but it's at least an interesting piece with a score that is sometimes very lovely.
On topic: The Mendes incarnation of Cabaret (with all the score changes that entails) is their best show, easily. Nothing seems superfluous or filler, it's smart, and it packs a powerful punch. It's a perfectly tailored show. I think that, to some extent, many of Kander and Ebb's work proceeding it end up aping it in some ways to varying degrees of success.
"...everyone finally shut up, and the audience could enjoy the beginning of the Anatevka Pogram in peace."