Actually, helicopters and aircraft like the A-10 are still useful even if we do not. So long as we have not given up air superiority most of the air to air fighters are going to be too busy seeking out each other to mess with the slower movers close to the ground.
During the Iraq war, the sky was full of F-15s, F-16s and F-18s yet their AF still had the time and opportunity to attack the low flying jammers.