If you use it for work, AI might be ok, but generating a guitar or piano track is zero fun compared to playing a real instrument (even if AI track sounds better). I think we should not forget this part too.

But what about an AI guitar that automatically frets the strings properly if you don't press them hard enough? Or an AI piano which shifts the keyboard when it sees that you are about to hit the wrong key?

Many instruments require lot of practice before you can produce acceptable sound. Can AI help with this?

Not only do the instruments require practice to sound good (I've been playing electric bass for three years and am just beginning to sound better than bad), but a huge part of the process is learning to listen to the instrument and make adjustments. The beauty is that you can immediately hear the result of the adjustment. If it sounds better, you keep it. Otherwise you move until you get closer to what you're looking for. With a prompt based ai tool, it is not possible to make low latency adjustments. Even if you could, how would you articulate the subtle adjustment to the llm?

My sense is that contrary to marketing, ai tools will be most useful to people who already have musical skill and will actively subvert musical development in most people who rely on it too early in their process.