User blog comment:James12708/The Yahg's Technology/@comment-1900300-20121025060329

Yes they are around 1960's technology. Very limited space travel and nowhere near enough to reach a mass relay. Now they have been quanentined by the Counicil they will take a lot longer to reach one, and by that point the Council will stop them militarily. Humanity didnt find a mass relay until almost 200 years after the first space satilite was launch and even then they had Prothean tech to help, particually ezo. Note that by the time the Rachni Wars accord, the Reapers first attempt to begin this cycle, humanity would probably have survived it at the time.