Remember people marry later if at all so you break the cohort developments of growing up and adulting.

I helped lead my local little league. It’s different than it used to be - it’s pretty typical to have tball parents in their 40s. A group of parents from 20s to 50s aren’t going to hang out, they don’t relate. I’m a late genx, most of my friends parents were in their 30s when I was a little leaguer.

The demise of old line churches is similar. We did CYO basketball in the same parish my wife did. It’s the last of what was 8-10 catholic parishes in my city. And unlike in my youth where you had good mix multigenerational parishioners… the parish survives based on the beneficence of 5-10 people in their late 60s and 70s, with few people rising to behind them. Mainline Protestant parishes are similar. The only growth in religious communities are independent Baptists, which are great but integrate into the broader community differently, because each church mostly stands alone and isn’t part of a bigger system.