Early this week, Microsoft made an exciting announcement with its SLA for a single virtual machine of 99.9 ℅ : https://azure.microsoft.com/en-us/blog/announcing-4-tb-for-sap-hana-single-instance-sla-and-hybrid-use-benefit-images/
Before this announcement, single instance VMs (which are not part of an Availability Set) were not covered by an SLA. This was unattractive for workloads which do not support, afford or need a multi-instance deployment. This was generally applicable for legacy workloads and to be honest, to the majority of non-critical workloads, and for SMB workloads which do not afford investing in redundancy and HA.
Many of my customers avoided migrating workloads to Azure, just because of this, which was offered by AWS since a while.
With this announcement, customers have the warranty that an SLA of 99,9 % provided to their VMs, which means a maximum downtime of 8.76 hours per 356 days –> 44 minutes per month
Do not forget that this is only applicable for virtual machines with all disks stored on Premium Storage.