Somehow, this feels like it needs its own building appearances. Anything you put down would be covered by something alive in no time. That would be amazing, it would also distinguish the Planet even after the concrete . It could also apply to the other planets, like volcanic ash on Vulcanus and Sli...

What I always liked about Factorio are the simple mechanics that provide a lot of freedom, like the entire 2-lanes-per-belt system. You can really juggle items around, especially in spaghetti bases. The quality mechanic does not seem to add to that. To use quality you need a lot of extra belt work, ...