They make a good case, and I’m frankly without a counter-argument.
As additional evidence: I have a jar of change on my shelf that once in a while I use to recharge my metro card. It only takes a minute or so to drop several dollars of quarters, dimes, and nickels in the slot but the machines don’t accept pennies. Those continue to accumulate. Once in a while I’ll head to the convenient store one the corner to buy a single item in a pinch – paper towels, flour, a sponge – and will bring that jar with me. If there is NO ONE behind me in line I will try to pay as much in pennies as possible. But I’d prefer not to do that, which is why we should kill the penny.
H/T The Atlantic