Earlier quoted context omitted.
Reading through this in detail just cements that we are never leaving this solar system unless we discover some new physics to get around our speed limitations.
Adding to the issue that it is relative pointless (IMO) to send meat popsicles all that way when a robot can make the journey about a million times easier and just send us some postcards. I hate to be a Debbie Downer, but it's kinda boring out there. We'd certainly not want to make the trek until the robots had scoured the galaxy looking for a fun place to visit. And by that time we'll all be living in some post-Sing…
Expansion will only go as quickly as travel time allows. Even the speed of light seems insufficient beyond a certain point. We will want to manipulate space.