And Voyager 1, the furthest man made object has already completed 0,0023 lightyears from the 4.3 lightyears to the nearest star Alpha Centauri. But its heading in the wrong direction anyway...
Even removing every single point of failure, statistically the other components would still fail over time.
I think whichever system you build, it would somehow need to be self-repairing.
Man I feel so alone.