My point still stands. Having no backup / contingency plan even if any third party system goes down on a time critical service means that you want to risk anot

My point still stands. Having no backup / contingency plan even if any third party system goes down on a time critical service means that you want to risk another disaster around the corner. In those industries, accepting to wait for them for a "day or two" is not only unacceptable, it isn't even an option.