It has nothing to do with the resilience of cloud providers. If the cloud providers were resilient, then you wouldn't need all of the wonderful scheduling tooli

It has nothing to do with the resilience of cloud providers. If the cloud providers were resilient, then you wouldn't need all of the wonderful scheduling tooling from stuff like kubernetes to deal with unstable individual machines. You can also certainly have a microservice architecture without running anything on the cloud at all. Microservices make it possible to simply deal with unstable environments. Cattle, not pets.