Almost all of the OpenAI team signed a letter saying they would resign if the board is not replaced, so safe to say that they do care about the leadership drama; perhaps more than the rest of us.
This is what I suspect; that their silence is possibly not simply evidence of no underlying reason, but that the underlying reason is so sensitive that it cannot be revealed without doing further damage. Also the hastiness of it makes me suspect that whatever it was happened very recently (e.g. conversations or agreements made at APEC).
Ilya backtracking puts a wrench in this wild speculation, so like everyone else, I’m left thinking “????????”.