wrote on 17/12/2018 3:09 AM:

are going to have to ship a lot of people to exoplanets among the
stars...

Never going to happen, since all travel speed will be limited to c =
3E8 m/sec, and practically something FAR slower.

Even travel to our very nearest neighbor star will take prohibitively
long.

Nope, only about eight minutes ... at the speed of light, of course!!

--
Daniel