OK, so they haven't been replaced by new residents [[I think everyone already knew that). Eighty percent of the population left. Remaining twenty percent probably not Catholic. Church closes. New church opens in suburbia. Life goes on. Church is the people, not the building. White flight sure; Catholic flight too. You expect people to stay just because they built a church in their neighborhood? I know the design of their church wasn't the reason for leaving, but it's not the reason for staying either.