This sounds great until your counterparties, banks, the government, customers and others complain bitterly that your monetary amounts are off.

Your expectations of course are not unusual because so many developers work on systems where users are not the customers, but the product.

Facebook, Insta, Google all fuck up results very regularly, but what are you gonna do when they do?

Now imagine your bank occasionally losing deposits, your account balance going up and down a percent or two every day, the IRS fining you for tax evasion because your Cool Fintech Rounding does not match generally accepted accounting rules.