The apocalypse doesn’t necessarily mean the end of the world itself, it can also be a transition to a new civilization.

The relationship between the worlds and the safe city feels like a mutual deal.

Safe cities plunders the resources of different worlds and take advantage of it’s self saving system. But by doing the world mission, safe cities can buy time for the world to continue healing (like Green Billow star) or help transition the world into survival (like Moon silk who survive their apocalypse).

I think if the worlds have consciousness, it’s the one who have contract with the core of safe cities and the market. It also pays the rewards in world missions. It’s what allowed safe cities to descend and form new safe cities.

In that case, I feel like Moon silk won’t have a new safe city for them. The Companies are really hated by the world. Not only the world mission was to off them, they have cognition lock. The world would obviously not give them what they want. But it’s logical since they’re destroying their world. Though seriously, who would want to float in the universe?! Lost and homeless?! Even Duxi is struggling to survive out there and they’re an interstellar civilization!