The Least Important Attribute

I was recently poring over a number of different RPGs to see how they defined and handled ability scores. One of the games I examined was Chaosium's 1981 game, Stormbringer, written by Ken St. Andre and Steve Perrin. Section 2.1.7 of its rulebook says the following about the attribute of Charisma:

This is a measure of leadership, charm, and of personality. It is not necessarily a measure of physical beauty, although it may be used as such from time to time. CHA helps your character in dealings with other player and non-player characters. In reality, it is the least important attribute. (italics mine)

Charisma (or its equivalent) is regularly deemed a "dump stat" in many RPGs, but I think this is the first time the text of a game explicitly makes this claim. The irony is that, while Charisma isn't as broadly useful as many other attributes in Stormbringer, it nevertheless plays a role in demon summoning and binding – significant activities in the world of the Young Kingdoms. Still, I find this section of the rulebook fascinating, since it would seem to be a rare instance of the designers speaking directly to the reader about the relative utility of some aspect of the game's rules.