Thanks, I was looking on the wrong page. Found it. I can agree with what you say, to an extent. You see, you are right also about p-Aminophenol developers not being supressed by high levels of Bromide (AFAIK) but OTOH, this is an interaction with all ingredients and hydroxide is quite similar in all versions and so Bromide would have no extra effect as a function of hydroxide in any version of Rodinal.
Therefore, there must be a reason for the high level of Bromide. Something else is going on if Bromide does not act as an effective antifoggant with Hydroxide. I would like to suggest that it might be moderating edge effects which began to become prominent as film emulsions evolved. Think about it.