Quote Originally Posted by nworth View Post
Although D-76 has not changed, the films may respond differently as they change. Considerable manipulation is possible with D-76, and small changes in technique can result in considerable changes to the look of the negatives.

I think you have hit on something very important here.

Ages ago, we developed our film in a different manner, and of course modern films are very different than they were back then. This changes the whole flavor of photography.