As others have pointed out, governments sometimes issue actual guidance on how it's supposed to work when they phase out currency. It's not always "just stop making them and see how the market deals with it."
On the other hand, we’ve been delaying this inevitable and necessary action for decades over hand-wringing about the implications of rounding up or down by a maximum of two damn cents per transactions _for decades_. If we did it “the right way” I’m sure it would take years and years and cost millions of dollars to “study the effects” of eliminating the penny. Just do it already. Even with the best plan in the world people are going to whine about rounding.
I actually like Trump (or at least his presidency) a lot more than I think most Hacker News browsers do. I like Trump's presidency more than most of my co-workers and many of my friends do. My arguments in this thread are entirely my own, not the product of some political allegiance.