So, is there a reason for us to stay after the "Apocalypse"? If so, is it necessary for us to actually play by the rules and try to survive like anyone else? Can't we just "accidentally" come across a very nice motorhome that's totally not a cloaked indestructible spaceship with its own self-driving AI, that can pull good food and medicine and anything else we need from the akasha? With AC, bed, bath, fridge, a super PC that can be used to directly talk with Astra and can basically be used as a way to go into space? Maybe it could even print actual medicine and non-gmo seeds to help the world/other survivors.
It having solar panels could be used as an excuse as to why it works, we could just say that its an electric vehicle.

It would be like being overpowered in an isekai. :^)