Three new Christian churches have been built recently in my locality, none of them traditional CofE. They have thriving congregations and do great work in the community. The Roman Catholic churches well represented, too
The mosques, temples and synagogues are similarly well attended, as are three Kingdom Halls.
My own CofE church has merged with its neighbour so the congregation is healthy.
Fewer people may go to places of worship today but more go because they want to, not because they are expected to. Surely that is a positive.