Sam Altman observed that OpenAI's nonprofit board structure grants them significant power without direct accountability to shareholders, unlike typical corporate structures, and he prefers that OpenAI's board be accountable to the world as a whole.
I think one of the things with our structure that we maybe should have thought about more than we did is that the board of a nonprofit has, unless you put other rules in place, like quite a lot of power, they don't really answer to anyone but themselves.