Does it hold up when given the (currently accepted) fact that sentient life can only develop as far as to know it is irrevocably doomed by the same universe fine tuned to create it? Entropy and all that.
Unless vacuum energy can actually be put to work, but that's not currently physically possible.
>>3216939
nothing generational ships cannot cure
>>3217010
Generational ships don't outrun heat death, Anon.
Now if there is no Big Rip, you might be able to sci-fi rig up some sort of stasis chambers that doesn't wake humanity until there's another big bang/entropy reversal event.