Miles Teg
Nuclear Powered Mentat
We're nowhere close on hundreds of different levels, it's not on the horizon, assuming we solve our world recession & can throw billions at it perhaps in 50 years we'll be fairly close but even that is uncertain (even assuming complete certainty we will recover for the global recession in the next few years which is in itself quite a leap).
Maybe we're just looking at this differently, but "Humanity is a hundred years away from living away from Earth" and "Humanity is on the verge of living away from earth" seem like synonyms to me. Behaviorally modern humans have been around for somewhere between 50,000 to 100,000 years old. From any timescale of extinction, we're just around the corner from getting off this rock.