The last-ever penny will be minted today in Philadelphia

I'd say screw it, get rid of nickles and dimes as well. Quarters can stay, for now.

It's a complete waste of money and time continuing to mint such low-value currency. It can't be used for just about anything.

Unfortunately, I do see the problem with part of this. For a handful of items where it does matter, it will force people to use cards more if they want to avoid rounding. And the card providers already have a choke-hold on retailers, and the whole thing is basically a scheme that funnels money from the poor to the wealthy via interest and fees on the consumer, interchange fees, and rewards programs.

I know you're referencing more than pennies, but to speak to pennies, I find the current rounding noise in the US to be weird. Likely, it's just more of the media, talking heads, and youtube personalities trying to turn a nothing into something, story.

Back when we did it in Canada, I don't recall a single person I knew concerned about penny rounding. Everyone was sick of pennies. No one cared. Everyone was happy. And the math seems fair enough:

https://www.budget.canada.ca/2012/themes/theme2-info-eng.htm...

Basically, if something is $1.01 or $1.02, you round down. If it's $1.03 or $1.04, you round up. Rounding is to be applied after all taxes are paid, etc.

Of course, there was also central guidance and, well, everyone just followed it. It's called "having a society".

People blathering on about stores fixing the rounding are morons, there's no way to do so if you buy more than one item. No one gets ripped off with the above method. In the end, it just works out.

And really, who cares?! It's a penny.

When the US attempted to transition to the metric system, gas stations raised their prices per unit volume and the American consumer was convinced that the metric system was bad. I have family that think metric is bad because some fringe people thought there should be 10 hours in a day and 100 minutes in an hour, also something like 10 months a year, and the whole thing is bad because some awkward ideas were floated.

Here, it's a question of resolution, with a proven history that transitions screw the consumer, though maybe it won't be so. We're ok with arbitrary hundredths of a dollar, why were we not at thousandths? The American half cent disappeared a long time ago. You still need to include the cents in a tax bill that runs into the millions of dollars.

It's just an awkward stage in inflation. Eventually a US dollar will be worth what a Zimbabwean dollar was, and we won't have $100 bills anymore.

During the French Revolution, they tried to make a right angle have 100 degrees and even recomputed all new trig tables for this new standard. It obviously did not catch on :)

https://en.wikipedia.org/wiki/Gradian

There's no reason you can't have 400 degrees in a circle and therefore 100 for a right angle.

It's a degree scale: you can choose any number you want.