Well, humans are still at risk of being wiped out by a war with a successor species and/or a war with each other aided by a successor species, regardless of which of these models is true. Not dying as an individual or species is sort of a continuous always-a-hinge-of-history sort of thing.
replying to edited version,
Well, humans are still at risk of being wiped out by a war with a successor species and/or a war with each other aided by a successor species, regardless of which of these models is true. Not dying as an individual or species is sort of a continuous always-a-hinge-of-history sort of thing.