I believe the future of AM is MA3 digital.
AM has no future. Almost no one under 45 listens. It might last longer than 10 years because what few 55+ buys exist go to talk radio, but I'd be surprised if it has much of any audience at all in 20. Some would argue it already has virtually no audience as it's already less than 10% of all listening in many areas. I don't see any way it can come back from that.