>With AWS or any other IaaS provider you're paying to outsource shifts of people around the clock that will work to keep servers and network connections up and running.

This is so often repeated, but at my previous company, the amount of internal outages was smaller than the amount of outages on AWS or GCP. We then migrated to AWS for some stupid reason (we didn't need scalability, that's for sure) and we had a problem with redis nodes: the instances they were running on were too small and an upgrade went wrong. We waited until the next shift for the fix. The irony.