For any critical service, they should have an alternate provider ready at all times so that they could instantly switch to it. Whether it's another external pro

For any critical service, they should have an alternate provider ready at all times so that they could instantly switch to it. Whether it's another external provider or in house, is not really relevant, although having a bare bones in house alternative for the critical parts is a good idea. What I'm suggesting is that people should use external services for their lower costs, better performance, or extra features, not to 100% depend on any of them.