[Someone1234]

An article I want to see is: A broad overview of Chromium's governance and exactly how much control any one party has.

You're arguing "sole" control which is a Strawman and doesn't really address anyone's actual concerns. A better discussion is: Can Google make unilateral decisions on Chromium's direction/support/features in any circumstances?

What I'm about to say may upset people but if Chromium's governance model was good enough I could see Firefox joining it and turning Firefox into another Chromium based browser.

The problem with hegemony is governance and control, it isn't technological. Purely on a technical level hegemony is a good thing. But who controls the hegemony? If it is Google or any corp that is really, horrible.