>I do have some concerns that they're having too much downtime. If there's one small flaw in the system it seems that the whole thing begins to fail. I think t

>I do have some concerns that they're having too much downtime. If there's one small flaw in the system it seems that the whole thing begins to fail. I think this is a case of selection bias. Most of the time, when their is a small flaw, the system transparently bypasses the flaw and the service continues uninterrupted while they fix the initial problem. Because of this, the only failures that people see are the ones where the bypassing process fails, in which case the problem affects many people. From the point of view of a single service running off of AWS, this is a much more stable system, becuase it will provide your service much more than a system without the auto bypass infastructure. From a end-user point of view, this benefit is not so clear, because while any given service is more reliable, they tend to go down at the same time.