First, given nanotechnology, it might be possible to build colonies much faster.
Second, I think the best way to live is probably as uploads inside virtual reality, so terraforming is probably irrelevant.
Third, it’s sufficient that the colonists are uploaded or cryopreserved (via some superintelligence-vetted method) and stored someplace safe (whether on Earth or in space) until the colony is entirely ready.
Fourth, if we can stop aging and prevent other dangers (including unaligned AI), then a timeline of decades is fine.
First, given nanotechnology, it might be possible to build colonies much faster.
Second, I think the best way to live is probably as uploads inside virtual reality, so terraforming is probably irrelevant.
Third, it’s sufficient that the colonists are uploaded or cryopreserved (via some superintelligence-vetted method) and stored someplace safe (whether on Earth or in space) until the colony is entirely ready.
Fourth, if we can stop aging and prevent other dangers (including unaligned AI), then a timeline of decades is fine.