I wonder if man will even exist by the time it's journey ends?

http://blog.chron.com/sciguy/2012/10/more-evidence-that-voyager-has-exited-the-solar-system/comment-page-3/#comment-157381

Interstellar dust particles should  degrade the probes within the next 50 million years...unless they get swallowed by a black hole, get too close to a Magnetar or the gama-ray burst of a pulsar, or get struck by a wandering planet or some other random floating piece of intergalactic junk.....so yes, they should outlast humanity by a lot.