My understanding is that Apple's approach to this integration is adaptable; much like how you would change your browser's search engine, you'll be able to change which external AI model is utilized. ChatGPT, Gemini, Claude, etc.
I don't think the choice of integration really matters for GP's point. Regardless of which model is used, how useful is the ability to rewrite an email in AI Voice really going to be? If I'm struggling over how to word an email there's usually a specific reason for it; maybe I'm trying to word things for a very particular audience or trying to find a concise way to cover something complicated that I have a lot of knowledge of. General purpose language model output wouldn't help at all in those cases.
I'm sure there are usecases for this and the other GenAI features, but they seem more like mildly useful novelties than anything revolutionary.
There's risk to this as well. Making it easier to produce low value slop will probably lead to more of it and could actually make communication worse overall.
