The way I see it, it’s a matter of creating suitable environments for humans in space. For the most part, that’s perfectly achievable even with current technolo

The way I see it, it’s a matter of creating suitable environments for humans in space. For the most part, that’s perfectly achievable even with current technology; the primary bottleneck is quantity of building materials, as human-friendly habitats are by necessity large and complex (space for centrifugal gravity, plus room to move around for mental health, plus space for all the requisite air process facilities and such). So this is another area where bringing down cost of pound to orbit is highly impactful. If that becomes cheap, it becomes feasible to build in orbit crafts (orbital stations, ships, etc) sufficiently large to support human-friendly habitats. Should Starship+Superheavy succeed, it will be a significant step forward in this regard since it can put the interior volume of the ISS in orbit in a single launch, and perhaps in a few decades use of resources mined from asteroids could become a consideration.