I think it's most likely to take the role of the commercial songwriters that write formulaic pop. The people that team up with folks like Ed Sheeran and Lewis Capaldi to squeeze an album out of them in time to fulfill their contracts.

The formulaic pop won't be much different. The pop stars will be much the same with up to date fashion. The people at the label will make more money because there will be fewer people to pay.

Writing music as a commercial venture is already pretty icky in my mind. It's sort of the artistic equivalent of learning pickup lines and using them on people rather than having an interesting conversation.

Music as art won't die but jobs as commercial composers and songwriters will dwindle.