A show in Miami brings together designs for 25 museums built in the past decade. “It’s a confounding mandate. Museums can no longer be temples-on-the hill, built by and for a tiny elite, but they must serve a larger and more diverse public without compromising artistic standards. The architecture must not be inaccessible, and yet it must be exceptional, enough to draw public interest and attract crowds with architecture that is both part of and apart from the city. All these are fodder for thought, and the 25 projects on view certainly can lift the level of dialogue.”