For the budget, you can set alarms about your expenditures. For the rest, I don't think I've ever worked with any piece of infrastructure that couldn't be crash

For the budget, you can set alarms about your expenditures. For the rest, I don't think I've ever worked with any piece of infrastructure that couldn't be crashed with one wrong click or keystroke. I've seen it lots of times, at least a few times a year: theret are dozens of systems and countless servers, and sometimes human error bring one down. You roll back the changes, reboot, or whatever action is called for and move on. What's different is the perception that cloud infrastructure should be significantly easier. But the ways in which it's easier are not in the area of mitigating the impacts of human error.