My family owned a soda/candy machine route until the late 2010's, we would find silver quarters and dimes in the coin hoppers quite regularly well into the late 1990's, several silvers per month, but by the mid 2000's to early 2010's it really tapered off to essentially nothing, maybe one or two silver coin per year. I also knew the guy who collected the coins from the payphones and would occasionally get a huge sack of reject coins from him, it was a bag of slugs, arcade tokens, and international coins. There were nazi Germany pennies once and another time a 1880's seated liberty dime, that's the oldest coin I ever found in circulation.