I can see how AI might be able to write a 2-3 minute pop song and let it squeak into a top-40 playlist. A couple of minutes isn't much of aa challenger.
Can AI put together a symphony? Take Beethoven's 3rd for comparison - made up up for 4 movements, each about 20 minutes. Themes, sub-themes, subtle melodies, etc.
I don't think AI can do that today - but is symphony-level complexity in the future for AI?