“I would not get rid of helicopters.”
For quick transportation they are useful, but close air support is the challenge in any future war. It’s essential to how the US Army fights, but if every infantry platoon has AA missiles then copters and low flying aircraft are very vulnerable.
Assume the battlefield is like Mogadishu.
I’m thinking the future may involve swarms of small cheap drones doing reconnaissance and target designation, and missiles launched from long distances taking out the designated targets.