In a moment weighted with ceremony, Apple entered the foldable phone market with the iPhone Duo, presented by hardware chief John Ternus on a red carpet designed to signal inevitability. Yet the announcement arrived not into a vacuum of anticipation, but into a market already shaped by years of consumer indifference toward a form factor that Samsung has championed without conquering. Apple now faces a question that engineering alone cannot answer: whether it can persuade people to want something they have consistently chosen not to buy.