Air superiority is outdated?
If we go back to WW2 the only way to achieve air dominance is to put airplanes in the air because that was the only technology available at the time. If two opposing forces go to war and one side has 2x the number of aircraft then it will most likely achieve "Air superiority".
However with advancements in computer, sensor, and missile technology I think the equation is a little more complex now. If two opposing forces go to war and one side is superior in anti-air defense while the other side is superior in the number of aircraft then which side achieves "Air superiority"? If I had to bet my money I'd put it on anti-air defense.
We're talking about a peer to peer confrontation here.