[quote=@Fallenreaper]
<Snipped quote by Mortarion>

We all would be dead by then, unless we found a time machine. :P 
[/quote]

[quote=@Mortarion]
<Snipped quote by Fallenreaper>

Or we could get everyone in the Borealis int cryostasis :P 
[/quote]

From what I understand, the ships that leave for Andromeda left between ME2 and 3 and everyone on board was put into stasis for the journey, kinda why Javik still looks like what I assume is a Prothean porn star in his culture after 50,000 years.