Originally Posted by railwayman3
Of the three, 126 wasn't a mistake - it solved an actual consumer problem - the difficulty consumers had in loading 35mm cameras. APS tried to solve the same problem. However, by the time APS came out, the Japanese camera makers had solved the loading problems by offering great autoloading cameras.
During the '70s and '80s (when I was sill involved in traditional photographic products) consumer use of color reversal films (as compared to color negative film) was much higher in Europe than it was in the US. I don't know how long that trend continued.
A former Kodak Photographic Engineer