The things that don't depend on it don't go down. Eg. Your email system doesn't go down because the building's elevator had a bug. It also let's you choose whi

The things that don't depend on it don't go down. Eg. Your email system doesn't go down because the building's elevator had a bug. It also let's you choose which parts to pay closer attention to - the microservices that's depended on by everything gets the extra operations