Indeed. Stealth aircraft aren't the norm yet and against non peer militaries an E-3 is good enough but the sale of Russian and Chinese VLO-attempt aircraft could change that. That's why the E-7 is the best choice to cover the interim period. The more advanced ELINT capabilities will at least be able to detect the AESA fighter radar from long distances.AEW&Cs aren't going anywhere anytime soon, even in their present guise. 90% of the time the operations are not against peer militaries, that said, even today, lumbering Boeings and Airbuses are pretty vulnerable targets if inside hostile or contested airspace anyway.