The USA currently rounds to nearest cent and it works well. I could buy 1.49 cents worth of something and have it rounded to 1 cent. If the rounding becomes 5c

The USA currently rounds to nearest cent and it works well. I could buy 1.49 cents worth of something and have it rounded to 1 cent. If the rounding becomes 5cents rather than 1cent it doesn't change a lot. I'm reminded of a comedy skit from childhood based on Australia removing 1 and 2 cent pieces. A guy buys 2 cents of petrol at a time repeatedly pushing his car from pump to pump at a service station. It went on for a while and eventually the owner at the counter, who was down a whole 10 cents at this point, just shook his head and laughed while exclaiming "Dickhead!".