What factor is suggested as a reason the idea of transactional automation lay dormant for so long?

Answer

Widespread use of standardized small-denomination coinage was less established

The text explores the historical documentation gap regarding Hero's invention, suggesting that the necessary economic infrastructure for popular adoption was missing in the Hellenistic world. While the mechanical principle was proven, the widespread use of standardized, universally accepted small-denomination coinage—which is essential for high-volume public vending services—was likely less established or less necessary for daily interactions compared to the structured economies of the 19th century. In an era where personal service or barter might have been more common, the impetus to pay a machine for a small volume of water simply did not exist to drive further invention or adoption.

What factor is suggested as a reason the idea of transactional automation lay dormant for so long?
ancientinventionHistoryGreekvending machine