It's interesting that it was created because Rodinal wasn't available. At that time there were alternatives to Rodinal available in the UK, Ilford had introduced their high concentrate p-Aminophenlol developer Certinal in 1907/8 and Mees and Shepperd had worked on similar developer and published their research around the same time, at Wratten & Wainwright before they joined Kodak.

It was some years before Kodak introduced their own version of Rodinal - Kodinol - and even then it wasn't made or sold in the US.