Japan is bracing for rage against the vending machine
businessinsider.com
businessinsider.com
I'm all for carrying cash, but clearly it's not the case that you can use it anywhere at any time, if 80% of the vending machines in the country won't accept these new bills. When and if these machines get replaced, it would make sense for them to accept both cash and cards. If that happens, you'd think it would only accelerate the move away from cash in Japan.
Odds are that rather than replacing the machines, society will make sure to hold on to the old money longer and the new bills will be not accepted by people.
In the US, when they came out with the "gold" dollars, they did extensive testing to make sure they would work in the machines just like the old SBA Dollars. I think the same was true when they change the design of paper money.
But now in the US, it hardly matters since the machines now take Credit Cards. And people in the US tend to live off those cards.
Surely if you're going round and retrofitting all the machines, retrofit them with contactless/suica readers?
People will just hoard old money and exchange new bills for old at banks rather than the other way around.