You make a good point Ray.

Rodinal is unique in that no other developing agent keeps as well in such a high alkali concentrate. Sometimes understanding how a particular developer functions triggers/sparks ideas for others.

As the Agfa Patents are cited in even quite recent Patents, or cross linked through others to Ilford, Fuji and Kodak it appears that the anti-oxidant used is quite important.

The simple Rodinal type formula has been reported to cause Dichroic fog with some emulsions. This may have become a problem as emulsion speeds were improved, there are quite a number of Patent's many not so easy to access, and some would need translation.

The problem with Dichroic fogging reared it's head again when Kodak released Tmax Developer, which isn't recommended for sheet film use for this reason.

Ian