The show is cheap to run and any new show would be a risk. The word that comes to mind as to why this show is still running with no signs of stopping is Tourists. Now, of course all of Broadway relies on toursism for ticket sales. But, for Chicago it’s a little different. Tourists, both international and domestic, tend to equate longevity with quality. In other words, it must be a good show if it has been running for as long as it has.
Look, at this point, the show has become a tourist trap show. A show those visiting NYC must experience, the same way they must take in the view of the city from atop the Empire State Building.
I think that this production is rather long in the tooth with zero thought of upkeep being given. Fran and Barry are, I’m sure, happy to collect the money that this show brings them and leave it at that. Do keep in mind that this production is not one that aged well. The Weissler’s don’t seem to care because people can and will keep coming, thereby allowing them to collect money. Between working there and seeing actors phoning it in or ensemble members who are a tad long in the tooth it shows.