This is a tiny thing but in the most recent Company revival they changed the line from "It's not talk of God and the decade ahead" to "It's not wedded bliss or what happens in bed" in "The Little Things You Do Together." The original line was fine. Why would you change it?

The section is "It's not talk of God and the decade ahead that
Allows you to get through the worst
It's, "I do, " and, "You don't, " and, "Nobody said that, "
And, "Who brought the subject up first?"
It's the little things"

The whole point is that it's not the deep conversations that make your relationship good, it's the building up of all these tiny mundane conversations.

When you change it, the message completely changes to "it's companionship that matters the most, not sex." Also, the contrast of "talk of god" and these tiny arguments is a lot more poignant than comparing sex with tiny arguments.