There is one way that AI could benefit music that seems not to have been addressed in this thread (unless I overlooked it): the ability to clean up music recorded in the first half of the 20th Century.
When the Revolver remaster came out last year in remixed form using de-mixing AI technology, I immediately thought that this would be a great technology to employ on old blues 78's.
Imagine listing to all those classic songs without the surface noise and with some pitch control on the voice. This is the way to bring Jimmie Rodgers or Blind Lemon Jefferson or Robert Johnson into the room in a way that was never before possible.
I'm sure I'm not the only one who thought of it, and I'm looking forward to hearing the Smithsonian Anthology of Folk in even better fidelity.