Industry behemoths have been known to change to keep up with the times (case in point: IBM), although it's damn rare. So maybe some of the studios and newspape

Industry behemoths have been known to change to keep up with the times (case in point: IBM), although it's damn rare. So maybe some of the studios and newspaper companies will figure out a way to endure. It would be a useful exercise to go over the list of companies that were in the S&P 500 in 1950 and see which ones did better than their peers in 1950-2000 and which ones faded from view. Unfortunately, the last time I checked, online stock listings only go back to about 1970, and with all the mergers, breakups, name changes, and stock splits that have happened since then, running these numbers by hand strikes me as a non-trivial project.