This is so true, I wish there was a way to make this more noticeable (flashing red lights on the order forms, regular email warnings about the single point of failure,etc.). This simple fact is taught in entry level system administration courses (RAID, Disaster Recovery Plans, Replication, High Availability, Fault Tolerance, etc.) but in reality some seem to not plan for it when moving to cloud services. I always suggest people set their apps up to be able to run out of multiple availability zones in case one goes down if it is very important to them. For those that are not able to I will suggest they at least setup replication to another server within the same data center and an offsite location in case their server has hardware failure, an account gets locked or other possible situation to help take of the just in case scenarios that occur to everyone.