Richard Dawkins is a fair bit older than me, but when he talks about his love of the language of the King James Bible and the Book of Common Prayer, I know exactly what he means...
I think there's a kind of generational fade in most religions. Pope Benedict's brother Mgr Georg Ratzinger wrote a little book about the two of them growing up in prewar Bavaria, and he describes a really immersive Catholic world of local shrines and feasts and observances that has ceased to exist. Probably it hung on in Ireland longer than most places.
I think of Jewish friends describing synagogues where most of the congregation don't believe in God, they all sort of tacitly agree they're going through the motions, but they feel that for family reasons it's important to belong to a congregation. I don't think their children will belong. The only Jewish communities thriving are the ultra-orthodox who reject modernity.
My basic theory is that few young people will be interested in religion, but those who do will come in two types. There are the young people who like the weird and supernatural and countercultural side of religion, and they'll gravitate towards religious communities that make demands on them. They'll become Muslims or Latin Mass Catholics or Eastern Orthodox or whatever.
And then there are the young people who aren't interested in religious belief, but do believe in the religion of the Omnicause, and they'll gravitate to small progressive religious groups, where the oldies will defer to the young people, hand it over to them, and they'll strip out the religion, replace it with politics and wear the group's tradition like a skin suit.
I'd guess that's what's happening with the Quakers. Something similar is happening with Wiccans, who likewise have a "be kind" self-image and are often Green Party members. That's when you see genderwoo being embraced by a fertility religion whose whole belief system rests on the polarity of the sexes. How they square that I'm not sure, but they do.