Church Project Theorem: Magnet Parishes
In any given area, the churches that have the greatest combination of a) architectural significance and b) prominence are more likely to survive. Those parishes become like magnets, attracting the poor, huddled refugees of the failed parishes around it.
For example: Our Lady of Hope is the union between the former parishes of Holy Child, St. Stephen and Our Lady of the Holy Souls. It’s no accident that OLH uses Holy Child’s former building, because it has the greatest combination of architectural significance and prominent location. Holy Souls had neither architectural significance nor a prominent location, and St. Stephen was prominently located but didn’t quite have the same architectural bang of Holy Child.