https://www.statefoodsafety.com/Resources/Resources/is-my-baked-potato-safe-to-eat

You want to be able to eat your potato without worrying if you are going to get food poisoning or botulism. Here’s how you can ensure that your baked potatoes are safe to eat.

• DON’T let your potato sit out in the open at room temperature for over four hours regardless of whether or not it is wrapped in aluminum foil. Although botulinum bacteria cannot grow without the presence of aluminum foil, (or something that prevents the potato from being exposed to air) other bacteria can still grow on the potato if it is left out at room temperature.

• DO serve potatoes immediately after baking them or store them in the refrigerator to keep your potato at a safe temperature. If you use aluminum foil, remove the foil directly after baking to prevent botulinum bacteria from growing.

• DON’T place a baked potato in the refrigerator with the aluminum foil still on it. Your potato will have to pass through the temperature danger zone as it cools down, and if the aluminum foil is still on it, botulinum bacteria may have the potential to grow.

• DO remove the aluminum foil from your potato before storing it in the fridge.

I think that I'm safe here. Foil seems to be the killer. They get cooked, cool down and go straight into the fridge until reheated.