Was it just a publicity issue? There was a real risk of a capability gap in that all of the old E-3 airframes would have to be retired long before a space based solution could possibility come online. Plus in an era of anti-satellite weapons proliferation, a crewed aircraft might actually turn out to be more survivable.

Hypocritically, Kegsbreath himself is on record saying the concern was about E-7 survivability: https://www.flightglobal.com/fixed-wing/2025/06/us-defence-s...