If they could get "Hey Siri, play 'Song Title' by 'Band Name'" to open the Music app and play the song I ask for, that's the extent that I give a damn about AI being introduced to iOS.
The only thing I have ever wanted from a voice assistant or AI assistant or anything like that on the phone is the ability to be listening to music, interrupt the music and tell it “add ‘X by Z’ song next in now playing” and then have it add it and continue playing the same playlist, but it’s never done that. It always replaces the entire now playing list.