Given all the regulatory scrutiny on the Google-Apple search deal, I believe we'll get an option to choose the 'AI Backend' similar to how EU users get to choose Search Engine. In effect a lot more people are aware of Google logo than OpenAI so that's what most common people will choose, while maybe most tech-savy folks will end up choosing OpenAI. This will be Apple's way to hedge against any further regulation option and they get to market iPhone as a AI aggregator similar to the AppStore.