The vast majority of users apparently are content with the existing coin denominations, including the one-cent coin.
This is what I don't get. The penny is, for all intents and purposes, useless. The only machines they interact with are those designed to getting rid of them. Even if you collected all the pennies you've ever come into contact with you couldn't buy a Happy Meal. And if you really wanted precision, why not go for 1/10 of a cent?