Given the recent IOTUS-Musk feud, it is surprising the E7 is being $hitcanned for a space based alternative using SpaceX rockets. Furthermore, this will take longer to deploy. Yes, aircraft vulnerability could be an issue but the E2 is perhaps more vulnerable than an E7 albeit more E2s can be acquired. Personally I believe the first consequence of a peer-to-peer conflict will the destruction of satellites by both nuclear EMP and kinetic hits thus ruining the future use of space near earth due to massive amounts of debris.