I joined a healthcare startup in 2014 that had a small infrastructure on Azure. Back then AWS weren't signing BAAs and Azure was the only player in town. Being an early startup, the company didn't purchase a support plan from Azure. One day Azure suffered a major outage (may have been storage related) and over an hour later, I reached out to Microsoft for written confirmation that we could forward to customers. Since we didn't have a support plan they flat-out refused to provide any documentation whatsoever about the issue. They wanted $10,000.
Azure - never again. Company moved to AWS within a quarter.
Azure - never again. Company moved to AWS within a quarter.