I have noticed the following example, which should be a dead draw:
I am wondering what is the theoretical material difference of a dead draw which is not a stalemate? (I am not asking about agreed draws.) Apparently we could not add more rooks to the diagram as all white pawns have not been promoted.
By the way, the game above is not drawn by the insufficient material rule, as white can theoretically win the game if black makes a blunder such as capturing the rook.