The FOR side treats the iPhone as just a box that iOS happens to ship in, but that gets it backwards. iOS is built around specific hardware — the secure enclave, the optimized graphics stack, the controlled update pipeline. Spread iOS across arbitrary phones and you don't get more choice, you get fragmentation: uneven performance, delayed updates, and security holes from components Apple never verified. The reason iOS feels smooth and private isn't magic; it's that Apple controls the whole stack. Breaking that apart waters down the product for everyone, without giving users anything they don't already get from Android.