Siri AI is not just a chatbot. There are deep hooks throughout the entire OS and across third party applications. Siri AI has been given wide access to the user's semantic index which will encompass just about everything on the device. Also remember that it isn't just the Apple user's privacy at stake. Any substitute will also have access to any interaction with other people. Apple is at least claiming to not keep any data people use with Siri AI, will Google, Anthropic, Open AI, etc. pinky swear they won't build a profile on me because a friend of mine chose their AI over Apple's?

I will wait and see what people find out about it before passing judgement. It's quite possible that it isn't possible to have an API to use other companies' AI instead of Siri AI. Are there any equivalent API hooks on Android?