If one wants to be practical and realistically some things are just not possible.We have to think about what we can think about in the immediate future.It's hard to think about something that is so far in the future that our imaginations can not really travel their without our bodies.
People like to think that with more time, they could accomplish more. Time is essentially a separation of space. Giving oneself more space does not necessarily increase possibility, particularly when those possibilities are defined by scientific principle. So, in essence, what is possible within the existing timeline is also what would be possible within the realm of a longer timeline.