With the fast development with AI technology, Will BIAB take advantage of it and upgrade the "Vocal Synth" in the notation page. I would imagine quite a lot of songwriters would very much appreciate the novelty. I know that I most certainly will.
I am aware that quite a few singers would disapprove on the premise the AI would replace the human voice in the future. Somehow I cannot ever see this happening. The human voice is very complex indeed. And it will still take a very long time for this to happen. In the absence of a singer whilst composing it would be very productive to have a virtual AI singer at your disposal.:-)