I never understood the desire to get rid of pennies; there's ALWAYS going to be a smallest sub-denomination to which every price is rounded, no? Now, from a pr

I never understood the desire to get rid of pennies; there's ALWAYS going to be a smallest sub-denomination to which every price is rounded, no? Now, from a practical point of view, it could be argued that there should be a limit of the NUMBER of types of coins that a currency has, and perhaps the penny is 'n+1' and should be removed due to that?