The ChatGPT integration was heavily gated by Apple and required explicit opt-in. That won't be the case with the Gemini integration. Apple wants this to just work. The privacy concerns will be mitigated because Apple will be hosting this model themselves in their Private Cloud Compute. This will be a much more tightly integrated solution than ChatGPT was.

I guess the question is, when are they going to use their own model?

Surely research money is not the problem. Can't be lack of competence either, I think.