>The board was in charge, and it's not a coup if it fires a subordinate (the CEO). If anything, the coup was getting the board ousted.
The CEO was a member of the board and the ones that fired the CEO also fired the Chairman of the Board, so the board went from 6 to 4. So far there's been even less of an explanation for the firing of the Chairman of the Board - who they offered to let remain as a regular employee - than there has been for Altman, though I see the removal of the Chairman as potentially the most egregious and coup-like.