Recently, Amazon's cloud service failed for several customers, and has not come back fully for well over 24 hours. As of the time I write this, Amazon has not commented as to what caused the problem, why it took so long to fix, or how many customers it affected.
It seems a client of Amazon was not able to contact support, and posted in a support forum under the heading "Life of our patients is at stake - I am desperately asking you to contact." The body of the message was that "We are a monitoring company and are monitoring hundreds of cardiac patients at home. We were unable to see their ECG signals"
What ensued was a back-and-forth with others incredulous that such a service would not have a defined disaster plan and alternate servers defined, with the original poster trying to defend his/her position. At the end, as the Amazon service slowly came back, the original poster seemed to back off from the original claim, which implies either an attempt to evade further scolding (and investigation), or that the original posting was a huge exaggeration to get attention. Either way, the prospect of a mission critical system depending on the service was certainly disconcerting.
Personnel from Amazon apparently never contacted the original poster, despite that company having a Premium service contract.
25 or so years ago, Brian Reid defined a distributed system as "...one where I can't get my work done because a computer I never heard of is down." (Since then I've seen this attributed to Leslie Lamport, but at the time heard it attributed to Reid.) It appears that "The Cloud" is simply today's buzzword for a distributed system. There have been some changes to hardware and software, but the general idea is the same — with many of the limitations and cautions attendant thereto, plus some new ones unique to it. Those who extol its benefits (viz., cost) without understanding the many risks involved (security, privacy, continuity, legal, etc.) may find themselves someday making similar postings to support fora — as well as "position wanted" sites.
The full thread is available here.