One of the better plays at the National Theatre in recent weeks has been about a 21st-century banker, Judy, who quits her job to become a 1950s-style housewife. In Laura Wade’s Home, I’m Darling, Judy ditches her corporate wardrobe for a kitchen pinny and feather duster. She could have stepped from the Good Housekeeping domestic guide my mother was given after her wedding in 1954.