Surprised to see no mention of Japan in the comments. As any visitor can attest, the country has way more vending machines than anywhere else I know of, and in way more categories. Soft drinks, tea (hot and cold), coffee, beer, hard liquor, tobacco, snacks, ice cream, rice, toiletries, even the semi-apocryphal used panties. The article below outlines some reasons why, but it seems to boil down to high cost of labor &…
If North America was speckled with machines vending hot canned coffee, I would use them far more often than e.g. Starbucks. I drank so many Boss coffees last I was in Japan, they're so convenient -- no line, not too-hot-to-drink, open 24/7, such as in the early dawn. Just a wonderful thing.
Side note: it blows my mind each time I’m in California and I have to drive forty five minutes or more to find a Dunkin’.