Pretty much the only golf books on my shelf are the collected works of Harvey Penick.
They feature feel-based instruction, pithy anecdotes, and good old folk wisdom. The charisma that drew people from around the world to Austin leaps off the pages.
To answer Tommy Paul directly, I would point out that Penick's life pretty much ran from the beginning of the twentieth century to the end, and I believe that people like that are highly qualified to comment on change.
In Game for a Lifetime, Penick has a long excerpt from Henry Cotton (1948) regarding the steel shaft, in which Cotton observes 300 yard drives and the death of shotmaking, and concludes that you can't stop progress. Penick add that without the steel shaft "golf would still be a game played only by the wealthy and the obsessive."
Similarly, he has an essay on the modern giant-headed driver and how it is easier to find the sweet spot on a persimmon clubhead.
He claims that drawing a line on your ball for putting alignment is vaguely against the rules, but is more concerned with its capability for distraction.
Over and over again he addresses modern equipment, agronomy, swings, behavior, etc. and he never seems threatened or disturbed by any of it. Reading Penick it seems there is no possibility of golf ever going down the "wrong road".