I have loads of these to the point where, if I hear a track out of context, I expect the next track I hear to be the next one on the LP.
I think that the 70s link is obvious. We all valued music a lot more highly in those days but we also had infinitely less access to massive amounts of recorded music so listened to the fewer Lps we had far more intently. Now, with Spotify and YouTube, people can listen to almost anything at anytime without paying a penny. This has to be a good thing but you lose the intimacy you get from knowing your collection of 20 LPs inside out.
Another Close To The Edge, Greenslade Time and Tide, Al DiMeola Land of the Midnight Sun, Brand X Product, Bruford Feels Good to Me, Genesis Seconds Out. The list is massive.