>Can't shake the feeling that humans exist for 400 million years on earth in a state of genetic stasis due to technology removing selection pressure and then finally die out as the earth begins to die

I think that's really the fate of man. There is nothing after homo-sapien.

We are destined to keep going, successfully as the apex predators we are, and forward as far as we can, but we are fated to never leave the earth and die here together.