Specifically:
> Mr. Altman’s departure follows a deliberative review process by the board, which concluded that he was not consistently candid in his communications with the board, hindering its ability to exercise its responsibilities.
> it remains the fundamental governance responsibility of the board to advance OpenAI’s mission and preserve the principles of its Charter.
So the board did not have confidence that Sam was acting in good faith. Watch any of Ilya's many interviews, he speaks openly and candidly about his position. It is clear to me that Ilya is completely committed to the principles of the charter and sees a very real risk of sufficiently advanced AI causing disproportionate harm.
People keep trying to understand OpenAI as a hypergrowth SV startup, which it is explicitly not.