There are very few parts on Broadway with an alternate (a person on a set schedule to cover a leading role.) When Bette leaves Dolly, so will the alternate.
So unless she's on vacation, sick or takes a personal day, she (with everyone else in the cast) she'll be there.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.