In the 2010s, investors poured hundreds of millions of dollars into start-ups that promised to reinvent how people shop for clothing. Stitch Fix and Rent the Runway were at the vanguard of one strain of this movement, popularising the idea that a subscription model could work in fashion. Though they had distinct approaches – boxes of clothes handpicked by stylists for Stitch Fix, rented luxury fashion for Rent the Runway – both held out…