It almost goes without saying that any classic rock album has withstood the test of time. The idea of an album still having staying power after decades of airplay is already a testament to its quality. However, only a few choice rock albums are able to sound just as good as they did in their prime.
For as much as people like to wax poetic about the great albums of the '70s and '80s, it's easy to tell where most of these albums come from just from one listen to the music. Whether it's the really thin production layers or the dated effects on display, not every album from rock's glory days necessarily sounds current in this day and age.
On the other hand, many albums from rock's glory years still sound absolutely spectacular decades after its initial release. Whether it's the style of music they were making or the different instruments at play, these records have decades under their belt yet still feel like they could have been recorded last week.
No artist can really anticipate their record carrying that kind of weight, but by some divine circumstance, these albums have been completely oblivious to the passing of years. That's what music is all about though: making art that will last long after you've departed from the Earth.