To summarize, Americans increasingly are either committed believers in evangelical churches or non-participants in organized religious activity. What is losing ground (and members) are the mainstream, moderate churches which were once dominant in this society.
SN is careful to note that a fair number of non-participants say they remain believers but find no utility in church attendance. These report conducting their religious life “internally” between them and their God.
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Having spent all of my pre-retirement adult life living in households where all adults worked, I know well that for many who live thus devoting a quarter of your weekend to church is a non-starter. The weekend is the main time you have for shopping, house and yard work, recreation, and catch-up sleep.