We shall see how strong the vending machine lobby is these days.
Any change to the weight and/or diameter of coinage could mean billions spent by the industry in updating or replacing coin mechanisms.
Most seem to going to using a debit or credit card.
It would effect every self checkout that takes cash which is perfectly fine with me. Publix grocery stores near me doesn’t seem to take cash at self checkout. I’m sure that saves them money in the long run.