Foldable iPhone Boosts Apple Lock‑In

Apple’s iPhone Duo combines a unique folding hardware design with iOS changes, proprietary hinge engineering, and eSIM‑only provisioning. That package raises the cost for users and developers to switch platforms and creates new accessory and app ecosystems tailored to a single vendor. — If major vendors make platform‑specific hardware+software bets, regulators and competitors must rethink competition, interoperability, and consumer choice in the smartphone market.