In a world where Say's Law always holds true, which function(s) of money still make sense - are not crazy?

Question

Quizplus · Accepted Answer

Say's Law posits that supply creates its own demand, implying that goods are essentially exchanged for goods. In such a world, money would still serve as a unit of account, providing a common measure for the value of goods and services, and as a medium of exchange, facilitating transactions without the need for a direct barter system.

In a World Where Say's Law Always Holds True, Which