Contrary to the free-floating urbanite stereotype of millennials, that under-35-year-old generation is now preoccupied with buying houses in the suburbs.
Could it be that rather than over-generalizing about generational characteristics, what we have been seeing is far simpler? Single people like living in cities, where possible mates are more plentiful and there is much more to do with them. But once they get married and have children, cities lose their appeal in favor of bourgeois considerations like home ownership and looking for a “good place to raise a family.”
Perhaps the millennials have stayed single longer than other demographic groups, but eventually adulthood kicks in. This might also apply to religious commitments, the lack of which among millennials has many churches worried. But church attendance always drops off among single adults, only to pick up again among married couples, especially once they have children.