This is a neat lesson in "Creative Destruction" that takes place over time and how the rise of one industry can precipitate the fall of another (and vice versa, I suppose). What is important in one era is a footnote in another. BUT without the former it is not likely the latter would exist. It is an interesting discussion to have.
If you are an old-time like me it is amazing to see some of the names that were eminent in my day are either gone of much less significant.
HT: The Big Picture