Apple’s first foldable, the iPhone Duo, hit shelves last week at $1,999 and reports already point to stretched supply. Early buyers are looking at January delivery windows in some markets while the titanium book-style design and crease-minimizing inner display get real-world scrutiny. CEO John Ternus has been clear in recent interviews that the company spent years waiting for flexible OLED and hinge tech that didn’t feel “cheap and crappy.”