Or warp drives are simply impossible or at least ultra unfeasible. Nothing unsettling about that thought.
Without travel beyond our solar system, we won't last forever.
And that's kind of sad for me.
For one thing, a large fraction of possibilities involves simulations. In a simulation with successful traits, some constants and elementary particles might turn out to have been misunderstood later on...
Which describes our species' travels until only a few thousand years ago.