We have open carry in my town, within a county of 50K people. There are not enough appreciable numbers of armed robberies to even compile stats. Everybody knows what you'll be facing if you pull a gun on a cashier.
(All the way down to an "Aunt Bea" I met one day in line for voting in 2016) When I asked who she liked for POTUS she opened her purse and showed me a two shot derringer, "What do you think?"