My assumption is that most users won't actually care if the LLM is in the cloud or device. That said, quite a few folks have iPhones and Apple's only way into the AI race is to go to it's strength, 1B+ hardware devices that they design the silicon for. They will produce a phone that runs a local LLM and market it as private and secure. People upgrade every couple of years (lose or breaks) so this will drive adoption. I'm not saying people will vibe code on their iphones.