It's unclear to me whether it will result in more homogeneity, as a result of prompts being a coarse medium that results in the AI choosing what it's seen to fill in the rest, or less homogeneity, as a result of more people with non-mainstream tastes being able to create music aligned with their niche that otherwise wouldn't exist due time/money restrictions. I think the latter seems a bit more likely, but time will tell.

There's not really any need to speculate when this has already played out in other mediums - would you say that the proliferation of LLMs has led to an explosion of novel and interesting works of fiction, or just an explosion of cookie-cutter slop ebooks?