My daughters call us at least once a week to chat, tell us the latest jokes and news or ask Mom for a recipe but they would never consider moving back into their bedrooms. Who wants to live with old people who go to bed early and enjoy quiet evenings?
Also, who wants to move back in with, say, 3 younger annoying siblings?
I can see an “only” or last child wanting to move back in, but not a firstborn. . .