There are not going to be many situations where you need this advantage, have an AWACS but your opponent doesn't, and your AWACS is able to survive while being

There are not going to be many situations where you need this advantage, have an AWACS but your opponent doesn't, and your AWACS is able to survive while being close enough to be helpful (both Russia and China have missiles that outrange an AWACS's radar, and the China and the US have stealthy planes and slightly lesser range missiles). It's a real limitation, it's problematic, and it has no upsides.