11 9s is for durability, not availability. ie, S3 will almost never lose your file, but sometimes you won't be able to retrieve it immediately. There was a pret

11 9s is for durability, not availability. ie, S3 will almost never lose your file, but sometimes you won't be able to retrieve it immediately. There was a pretty significant S3 availability outage not too long ago, which is probably what the parent comment is referring to.