Well said but in defense of my favorite Beatle from my youth I think his musically unproductive years were more like from 1975 through 1980. He did release four albums from the time the Beatles broke up in 1969 through 1974. Three more albums than most artists today release in the same period of time. Of course artists like Ryan Adams and others are the exception.
Plastic Ono Band, Imagine, Mind Games, and Walls And Bridges were nothing to sneeze at in that four year period. And the song Imagine is potentially one of the most powerful songs ever written.
And the artists during the 60’s like the Beatles and Stones were pressured from their record companies to release two or more albums in a year while also touring. Not an easy task.
Making it in the music industry is for only the few but for those that do make it I’d say they have an easier task in the world of streaming and not being pressured to cut an album every year or three.
I enjoy a lot of the new artists that I can hear through streaming but I’m not simpathetic if I still enjoy the music of the 60’s, 70’s and 80’s.