My prediction is that it will take a while for the processes and habits to changes, but programming manually or at least reviewing code will become a niche activity, pretty much like building or maintaining mechanical clocks or old-school woodworking with hand tools.

Building software is hard for humans, managing the complexity of large projects has been at the frontier of our intellectual capabilities for a while, leading to well known issues in cyber security and exploding costs. At some point machines are simply better suited to the task.