I don't believe this thread has yet run it's course.
Of course, one must look at the age of the reader being influenced. Those books were primarily being taken out by people of a certain age. Younger readers no longer read that material. Younger minds are generally more open to new ideas. If you apply your hypothesis only to those people that marketeers call "early adopters" then it will probably be true.
However, I would hypothesise that what they are reading still has much more to do with "fashion" than with "quality." The initial question of "why some authors are 'fashionable' while others have fallen out of favour" is still not adequately answered by this discussion. Maybe it is too complex to ascribe to a single thing. People have said quality, the publishing industry, Hollywood and I'm sure all those are involved. Maybe the question is like asking why the length of ladies skirts go up and down each year?
Having once worked in a public library in my youth I doubt this hypothesis. The most popular books for women were Mills & Boon romances and for men it was probably pulp Westerns paperbacks. That was almost 40 years ago. No one would try to claim that in the last 40 years the biggest influence on popular culture has been Mills & Boon romances and Westerns.Taste is personal and subjective. It was just evidence to show an indication of how well read the various authors were compared to each other. Someone is claiming that one author is more 'influential'. Actually having read the author is the first step in trying to make sense of that claim, as I'd suggest as a hypothesis, the more well-read an author is, the more influential - whether for good or ill - they will be.
Of course, one must look at the age of the reader being influenced. Those books were primarily being taken out by people of a certain age. Younger readers no longer read that material. Younger minds are generally more open to new ideas. If you apply your hypothesis only to those people that marketeers call "early adopters" then it will probably be true.
However, I would hypothesise that what they are reading still has much more to do with "fashion" than with "quality." The initial question of "why some authors are 'fashionable' while others have fallen out of favour" is still not adequately answered by this discussion. Maybe it is too complex to ascribe to a single thing. People have said quality, the publishing industry, Hollywood and I'm sure all those are involved. Maybe the question is like asking why the length of ladies skirts go up and down each year?