Google's dominance comes from market share not from owning upstream. If a different fork took 90% market share that fork would have the dominance and power.
That can only happen if we don’t all focus resources on Blink, which is the point. By definition, we can only have other engines if diversity is a thing.
The problem isn’t specifically Google (though they are a problem), but any one individual company having all the power.
Why? What's fundamentally stopping Edge market share from going to 90% that would go away if they switched back to their own browser engine?
>but any one individual company having all the power.
Open source means that anyone can make any change at any time. Google doesn't have all the power over what a fork does. A fork is still in full control.