I think it was me that mentioned that lol. When I seen that text on WT about the asteroid field, ringed planets was the first thing that came to my mind.
Sure we have asteroids in NMS but its clusters. Asteroid fields are a bit different. Usually they are a ring around a planet or even a circular belt in the gravitational pull of a solar system. And the composition sounded to me like a planetary ring.
I don’t like to speculate to much but the thought of ringed planets with a purpose like asteroid mining sounds like it would be an epic addition to NMS 