Does the "Golden Age" question refer to recording or to advances in equipment?
If recording, then the 50s and 60s. If equipment, then circa 1972 - 1995. This was a period where we still had brick and mortar establishments and people got to hear equipment easily. Also, the tube made a comeback (thank you, William Z. Johnson), and triggered a rush towards achieving the "absolute sound."
That is no longer the case. When people discuss music, they refer more to the "features" of a component, very rarely actually addressing the music itself (which IS the purpose, no?). This, by itself, is less "involving" than what the High End scene was like even 30 years ago.
And "The Future" does not - to me - automatically indicate that we will make advances in reproducing music (and I mean, unfiltered, unprocessed and un-manipulated, which removes nearly the entire pop music kingdom of recordings as far as sound quality goes). People discuss soundstaging and imaging instead of talking about the music itself. And you have critics online who had no idea what acoustic music sounds like, which is ironic: the whole High End came into existence because of a desire to make music sound more as it did in the symphony/opera hall or jazz club. Given that classical and jazz music are the least known to younger audiences, hearing a trumpet the way it was actually played seems less an imperative than whether or not it has ’x-inputs" or the newest datachip. Passion and curiosity to create magic thru either tubes or transistors drove the first wave of "The Golden Age"; I’m uncertain what direction we are headed in right now. But with AutoTune, mediocre singers (clearly, a stunning voice is not a requirement for fame in the music arena nowadays) and with the amount of manipulation that is visited upon so many recordings, this is most certainly NOT the "Golden Age of Recordings."
There was a time when people were more attuned to music, and that changed around the very, very early 21st century. The move seems - in this era - towards tech-in-audio, and away from (unaltered/acoustic) music as heard with minimal electronic intrusion.