Earlier quoted context omitted.
If all you're looking for is polished backing tracks, why couldn't Band in a Box serve that function? https://www.pgmusic.com/
It could, but I want it to be even easier and with better results! I think AI has that potential. I am absolutely sure it does, in fact, and that some AI product will obsolete Band In A Box within the next decade. Maybe within the next year. If the people who make BIAB aren't working on it, themselves, with full focus, they are making a big mistake.
Having played music nearly all my life, songwriting included, and soaked up almost every bit of music-making tech in the process, I'd wager we won't see AI delivering better results more easily and, importantly, with the flexibility of Band in a Box within the next year.
The playing/performance part of making music is a solved problem. You can do this with DAWs and plug-ins today. The truly hard part is coming up with the ideas. That's where AI has an opportunity.