I suspect it's because nobody wants to admit that a penny has become worthless, and probably a nickel too. Also, there may be people who are worried that they will start getting ripped off by the rounding process.
I read a book about units of measure, and there was often strong local resistance to adopting regional or national standards because folks thought it would be a chance for merchants to surreptitiously raise prices. They were probably right.
I read a book about units of measure, and there was often strong local resistance to adopting regional or national standards because folks thought it would be a chance for merchants to surreptitiously raise prices. They were probably right.