Overall, I haven't had too many recordings that haven't aged well.
At least since I discovered prog, and all its subgenres (avant-prog, Zeuhl, Canterbury, symph, technical-metal, prog-meal, etc).
Since I tend to only enjoy music with the following attributes: very high level of musicianship, complexity, deep and broad emotional and intellectual content, avoidance of verse>chorus>bridge format that relies on hooks, the music I listen to tends to age well, because those attributes don't fade.
Great musicianship, a good level of complexity, etc, do not age, even if things like vintage synth sounds may. So, just because a Genesis, PFM, YES, or Univers Zero, recording from the '70's may have dated keyboard sounds, the music itself is just as creative, complex, extremely will played as it was back then.
I also listen to plenty of Jazz (post bop, fusion, chamber jazz, M-Base, avant-garde jazz), and modern, avant-garde, atonal, serial and contemporary classical music, and these also age well for much the same reasons as those listed above.
