On March 21, 2024, the United States Department of Justice and sixteen Attorneys General sued Apple, alleging that “Apple undermines apps, products, and services that would otherwise make users less reliant on the iPhone, promote interoperability, and lower costs for consumers and developers.” In other words, many of the DOJ and AGs’ allegations boil down to lock-in - that is the features chosen by Apple lock in developers and users to stay in Apple’s ecosystem by making it harder to switch or jump between platforms. We discuss the case and the claims advanced, and what it might mean for antitrust enforcement, tech, and consumer experiences.