For the next 20-30k years, the Sun will be the closest star to this spacecraft. Any alien civilization capable of interstellar travel would probably be intelligent enough to reckon that the probe, if chanced upon within that timeframe, would originate from Sun and might pop over for a look. Beyond that timeframe, I'm not so sure a record would be in playable condition. Furthermore, if interstellar travel were actually possible, one would rather hope that humanity would have developed it by that point.
All-in-all, it seems unlikely that a golden record would be all that useful.
i'd think there would be very little erosion in interstellar space, even over billions of years.
"Perhaps the records will never be intercepted. Perhaps no one in five billion years will ever come upon them.
Five billion years is a long time. In five billion years, all human beings will have become extinct or evolved into other beings, none of our artifacts will have survived on Earth, the continents will have become unrecognizably altered or destroyed, and the evolution of the Sun will have burned the Earth to a crisp or reduced it to a whirl of atoms.
Far from home, untouched by these remote events, the Voyagers, bearing the memories of a world that is no more, will fly on."
- Carl Sagan, Pale Blue Dot: A Vision of the Human Future in Space
I'm not convinced such artifacts add anything of significant probable value over what's already implied by a sophisticated space probe of obviously unnatural origin, should it be discovered intact by aliens.
So a priority should be to maximize how interesting our interstellar mission artifacts are to unlikely alien discoverers?
The probe itself is interesting enough, and there are many reasons to be reserved about how much self-describing information we voluntarily share with completely unknown aliens.
I personally find comfort in knowing there's nearly zero possibility of anything intelligent finding voyager intact.
seems like a waste of a very unique opportunity.