I'll agree that for us old folks that 1971 might be the most prolific year for the most popular albums by the groups at the time , ( you forgot my favorite of all time )          David Crosby " If I Could Only Remember My Name " .                                               Out of the 34 albums mentioned I have 17 of them and saw 4 of them in concert .

But you must admit the stuartk has a point .

@gowanus 

Fifty years from now they will still be listening to music from the 60's and 70's. Just like they will still be listening to 50's and 60's jazz.

This is because what lasts is music that contains innovation, creativity, musicianship, dynamics and emotional impact.Properties that are in scarce supply these days. Much easier to copy someone else's hits or stick with a formulaic genre like hip hop or rap.  

"Killer" by Alice Cooper"

Push it out a couple more years-"Billion Dollar Babies" 

1973 had all the usual suspects release more great work.

@vair68robert 

@stuartk is 99.7% correct that the music between 1967 and 1977 was magical, but the point of my comment was the picking of 1971 as its apex.

Of course I knew that there would be pushback because there is a tendency for people to become emotionally attached to music that they are exposed to when they are in their early teens. The flavour of the day, so to speak. There is also an element of people that just want to disagree with any statement they hear, without spending the time and energy to actually think it through.