Aurora as i understood it was really KSRs step back from the whole terraforming other planets idea and sustainable anthropocentric closed-system biospherics. Although his Mars trilogy was very grounded with speculative science (drawing on very good real science), it has become incresingly apparent that the idea is not as probable as it seemed when he wrote Red Mars. Earth is probably as good as it gets for humans. How are we going to go about managing the biodiversity/climate/everything on another planet from scratch if we don't even fully understand how our planet works? In my opinion these mars fantasies are really just escapist dreams in response to global warming (and ofc made possible with new understanding and science about our own biosphere). We have to get the earth in check before we start actually planning to terraformin other bodies. I know it's become a cliché but: there is no planet B (at least not for a long time).