Oh I’m sure little pockets of it will endure for generations. Particularly in cities.
But most are in a similar situation as the one in my hometown (pastored by a woman I attended school with).
Virtually 100% of the budget goes to keeping the lights on, the rain out and the pastor put. And it is provided by a handful of old doctors and lawyers very much in their twilight years with children and grandchildren that are openly irreligious and generally show-up only to please “pap-pap”.
But I fully agree that there are some in larger cities and maybe a few rural areas that are quite vibrant, despite the utter devastation their numbers have experienced nationally in just the last generation.