Same is happening in Australia. It seems to me that the larger churches draw people in, especially the younger generation. It saddens me because so much revolves around "worship". One place I've been to is so loud that my ears were ringing after the singing. God is the "Ancient of Days" but He is not deaf. Too many places are more entertainment centres than spiritual families. Having 10,000 spiritual infants is not growth. It's just numbers and God is not impressed with that. God looks for maturity, for unity, for sound teaching and above all for love. I visited an internationally renowned church in Asia a few years ago. It was packed. You had to have a ticket to get into the first meeting where the Pastor preached in person. I found it sterile and not very friendly. Talking about love and unity is far easier than living it.The area where I live.. there are some large churches. But mostly it's very small churches. Less than 30 people showing up on a Sunday. And most of the people showing up are 60+ years old. There are very few young people attending these churches.
What is going to happen to these churches as their members pass away? There's nobody there to replace them that I can see.