AWACS had parachute and some chut you could slide out at one time. Don’t quote me on that entirely. They simply were not worth it. First most accidents happen and have happened on takeoff and landing. No good in that situation. In a war environment, getting hit by a missile, pretty much the only weapon that will take down an AWAC or similar. Missiles likely won’t give crew time to escape. Plane will be doing some kind of tumble. Then you got training. It not simply train once and all good but every year. Sometimes it is better to use that money and time to provide better alternate training that will be more effective. Say for more escort aircraft or better alternate safety systems within the aircraft. You also have the space it takes up resulting in less functionality of your aircraft.
In a large scale world war III scenario, AWACs and similar would be a dangerous plane to crew. Shot down rapidly. In our current warfare situation, they are one of the safer planes to be in. Unless you are Russian and incompetent.
Need to get back to silent videos and photos only.