By Hannah Marriott / The Guardian The press conference for the Met Costume Institute’s spring exhibition is always a stately affair, but this year it was giving “feudal lady addresses her serfs” or perhaps “Marie Antoinette during the last days of Versailles.” Here, among the spectacular marble sculptures of the art museum’s American wing, was a beaming Lauren Sanchez Bezos, who Anna Wintour introduced as a “force for joy,” before adding that “she and her husband, Jeff, have shown with this...