I've also seen companies fail precisely because the founders were unwilling to give up any control. They may have thought they were choosing between 100% of 10

I've also seen companies fail precisely because the founders were unwilling to give up any control. They may have thought they were choosing between 100% of 10 million and 5% of 200 million, but by being unwilling to give up any control at all they doomed themselves to 100% of 0. In fact, I'd say that the most common mistake I've seen/heard about is often people focusing way, way too much on their personal stake and control, thus crippling the ability of the business to expand.