I think that ML stuff has been in place for many Apple apps (like iTunes and Siri), for a lot longer than that. A lot of it is server-based, though.

The main thing about 18, is moving into the hardware, and adding a lot more of it.

AI is not only LLMs or other generative AI. There is also FaceID, Siri, even the camera uses AI. The author also doesn't make this distinction, sadly.