That's why master shouldn't be whatever you're about to deploy for the first time, but the known-good version that has been burned-in on prod (for an hour or a

That's why master shouldn't be whatever you're about to deploy for the first time, but the known-good version that has been burned-in on prod (for an hour or a week or whatever), so if you have to abandon a release you don't have an entire team who already rebased on top of it.