Not long ago, Nvidia was the world’s most valuable company. Now its future is far less certain. ADVERTISEMENT ADVERTISEMENT Since Nvidia announced Jensen Huang’s resignation on Thursday, Wall Street analysts have been trying to size up what his departure means for the chipmaker and for the AI industry he helped build. Huang, 63, was one of AI’s most visible champions. He fuelled the boom with advanced chips and financing deals across the supply chain. Nvidia invested in customers and suppliers, helping cloud providers and AI labs build out the infrastructure that runs on its chips. Colette Kress, Nvidia’s finance chief…