That makes sense, I guess "reinhabiting" isn't the proper word for this.
What I mean is, we go to these old abandoned places and make them look prettier, and not just thrown together. Get decorative, and make these places interesting to look at. Make people WANT to live there! Cleaner, easier to navigate, less cluttered with random pixel art and dull looking building.
I guess it doesn't matter that much. I can always build a whole bunch of massive utopias close to one of these cities and eventually take over all the space.
Giant floating island cities would be nice to look at!