Golden age of vinyl recordings?

There is no relationship between analogue and solid state. In fact many vinyl recordings were done with digital recorders and then transfered to vinyl discs.

I would estimate that the "golden age" of vinyl (analogue) was in the late '60s and early '70s.

In classical music, the so-called "Golden Age" was probably the mid-to-late 50s and early 60s, when companies were just starting in stereo, recorded in analog and didn't multi-mike or process the sound that much; as a result, recordings from that time had a more natural and realistic sound than later, when multi-miking, severe compression and digital recording became the rage. Recordings from Mercury, RCA, London/Decca and others from that period are often highly prized by audiophiles; hence the reissues that have come out generally are of recordings made in that era. There are some exceptions, of course, such as the Lyrita and Vox releases from the 70s, and Decca and EMI in my view maintained a high quality standard beyond the early 60s, but RCA (with its Dynagroove recordings) and Columbia/CBS and DG (excessive multi-miking and brightness) went downhill IMHO after that period in quality vinyl releases.

I don't know if there was a golden age for rock in terms of recordings--I tend there to think more of artists than recordings, but I'm sure others will give their thoughts on this and on jazz recordings.

Rcprince has hit it spot on. But don't ignore today's high quality recordings and reissues coming out on vinyl. For blues, the new recordings from Analogue Productions are superb and the rissues of late 50's and early 60's recordings from companies like Speakers Corner are outstanding.

In the classical genre, some additional examples of the excellent quality exceptions mentioned by Rcprince during the 70's and 80's (beyond Lyrita and Vox) include: Harmonia Mundi, Astree, BIS, Alturus, Klimo and Hyperion. All of these labels were making incredibly good recordings.
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Thanks. Now to pursue some of these Holy Grails.

The present period properly referred to as the "high nostalgic" period. This period is noted by people scrounging for every piece of old vinyl extant or else paying $50.00 a piece for records that are often enough poorly pressed. Good vinyl may be great, but it is also hard to find.