I was watching a video on the history of EMD and the FT103. At the end of the video was the credits. It listed the source of some pictures and slides from Hot Water ( Jack W.).
It is interesting to see the full history of the EMD road engines and switchers. There was a brief history of some competition from Alco and a flash of Baldwin's releases.
There seems to be a line drawn where the steam era transfers to full diesel. I find it interesting to see how long the diesels were in service before the steam era ended. The video eludes to the fact that this model release from EMD seem to spell the end for the steam dominance that RR management held in high regard.
I used to believe that once diesels arrived, steam quickly faded away. I always thought it was somewhere in the fifties. It's fun learning what really happened in history.