Sometimes the more things change the more they stay the same and photography is no exception. The information and advice offered in this 1940s Vocational Guidance Film for aspiring professional photographers is still as applicable today as it was in 1946 when the film was made.
Of course things have changed since 1946 but more things have remained the same than have changed. Today most people shoot digital instead of film. Post processing, and retouching is performed on a computer. The filed of professional photography is still crowded, even more so today than it was in 1946 as the film points out.
So photography hasn’t really changed that much over time, it’s mainly the tools, the methods and how we think about photography that have changed.