why hasn’t anyone taken a rocket further than our milky way?

Question: why hasn't anyone taken a rocket further than our milky way?
- Keywords:
  milky way,
  rocket
Asked by Amsy on 9 Nov 2016.
- anon answered on 9 Nov 2016:
  
  The Milky Way is massive. It would take a long long time to travel to the edge of it.
  
  That’s the thing about space, it’s so vast that it just takes so long to get anywhere.

Question: why hasn't anyone taken a rocket further than our milky way?