Kodak, Ilford, Agfa etc had similar formulae, D61a comes to mind. It was a case of photographers switching from contact printing and enlarging.

The professional LF users said hang on we can improve our quality too by using Fine grain developers too, and so everyone switched. many Pro's dropped down from 10x8 and larger to 5x4 cameras as a result. Only one of my professional friends continued to use 10x8 (& larger) but he worked for a large International catalogue company who shot everything on transparency to actual size for repro.

My personal take is why shouldn't my 5x4 & 10x8 negs have the same sharpness, fine grain, tonality etc as my 35mm negs. However Platinum &n Alternative processes need very different negatives.