You can't extrapolate the future from the past. It's definitely possible that there are some very hard technological ceilings that we'll hit at some point of ou

You can't extrapolate the future from the past. It's definitely possible that there are some very hard technological ceilings that we'll hit at some point of our development. The universe (probably) isn't designed to be easily conquerable by humans or any other species, so it's not given that we'll emigrate from our solar system or even Earth. Colonization of other planets in our solar system is probably feasible, but I doubt such a colony could be self-sustaining as modern technology requires incredibly complex supply chains to manufacture. And as long as we don't have any replicator-style technology this won't change. Imagine e.g. how difficult it would be to manufacture a microchip on Mars (or a space suit, which requires complex materials and processes). I think a colony on Mars could not survive on its own for more than a few decades. Colonizing other systems seems even more outlandish and outright in the realm of science-fiction to me. I think we just believe that colonization will be normal in the future because science fiction works regularly tell us this story, so we naturally normalize it.