The real main point of the AWACS is the CS.
You have all these people who can focus full time on controlling the sky. That's why it's an Airborne Warning And Control System, instead of an Airborne Radar System.
Now, yeah, sure. The radar is important, even necessary. But you could say the same of the engines. It's the people -- with their skill and experience -- who are the heart of the AWACS.
Could you just fly the radar around, and have the people in a container on the ground, like drone operators? Yes, technically you could. But there would be issues with that, issues that could become very important during a war with a peer enemy. For a start, latency. When you control the airspace during a battle, you do not want your situational awareness to be ten seconds late because you're in California and your radar is over the Malacca Strait. The second is jamming. When you control the airspace during a battle, you do not want your situational awareness to be nonexistent because the enemy is operating some jammers.
And no, satellites are not the trump card. Everyone and their grandmother has anti-satellite weapons nowadays. Russia and China have demonstrated ASAT kills. So have the USA and India.
True, but our discusison wasn't centered around that.
Anyway that bit can be handled by the fighter jet pilots themselves. 'Cause wireless tech has advanced plenty enough to allow high bitrate communications.
We could have planned something like that with the FGFA, the two-seat one. Two of the two-seat versions would have given us four controllers. Combine them with 2 stealth ESM-capable MALE drones each, spread the whole pack out across a hundred kilometer wide area. And a HALE drone flying at an altitude of 30 or 40Km with a UHF or an L band radar. Those 4 MALE drones should be synchronised with the radars of the FGFA and the HALE for multistatic capability.
Anyway there's no point in being a controller if you are being corrected all the time, like the case with the F-35 and the E-3s in exercises, where the F-35s end up identifying threats far sooner than the AWACS can and end up generating a far superior picture of the battlefield beforehand. So the AWACS has already become the weak link in the chain. Personally I think centralised decision making is slowly on its way out. Which is likely why the Royal Navy is looking at bringing in drone AEWs to support the F-35's mission instead of bothering with a manned AEW&CS. This would transfer the "CS" bit into the hands of the F-35 pilots.