Well, I think the issue has been people don't mostly like them or use them.

I don't know why the US is uniquely(?) in this stasis around the denomination of money in circulation. Of course, at this point, it's pretty academic.

Pennies should have been gone decades ago. And it's still hit or miss to use anything above a $20 especially in a smaller store.

> people don't mostly like them or use them

This is also true of pennies.

Certainly. Pre-COVID lots of places had little dishes near the register where people could toss one or two pennies in and take one or two out.