That is indeed a profound thought experiment, considering Bitcoin's role detached from traditional currency pegs. Value in a sound money system is not 'snapshotted' but rather dynamically determined by market forces and the relative scarcity of goods, services, and the currency itself. Should deflation persist as intended, 40 hours of labour might yield fewer sats in number, but their purchasing power would commensurately increase, ensuring the true market value of that labour remains robust.