I'll agree on all but one point. The cotton/linen notes feel so much better in the hand than the candy wrapper plastic of Canadian bills. I know it's a dumb reason, but I just hate the feeling.
It would also take quite a lot of refilling when everyone in a city needs to use the ATM.
We still need to be able to function during weeklong post-storm/flood power outages, which happen with quite some regularity. Here in New Zealand, the most recent weeklong outage in Southland was only last month, primarily due to 200kph winds.
Let us not sacrifice everything to the gods of convenience.
A friend from Australia came to visit and after a day driving around New York State said “it feels half finished”