> theoretically it can react to crowds better than any human could

That's one area I'd expect AI to do poorly. Performance is a two-way dialog between performers and the crowd, with facial expressions and body movements from both the stage and the audience in communication. I'd expect any AI that's not attached to a humanoid robot to be less exciting to a crowd.

However, I am very excited about AI in some of the other contexts you mentioned, like as a music-writing or editing partner.

Imagine a club where the people dancing are wearing, for example, heart rate monitors amongst other things. In that scenario they already weren't looking at the DJ and the AI would have a steady stream of information to work with.