I am under a rock of denial of how bad popular music has become. I was checking out some other tracks on this site and now believe AI could eventually take a lot of musicians jobs, for advertising and so on. But there won't be an AI Kurt Cobain.

AI's bread and butter will be "customers who just want generic art for generic commercial use, any quality art, and pay as little as possible for it." It's probably never going to need to create the next Billie Jean hit.