S3 strong consistency implications

I would point out that concurrent applications still need to consider that Amazon S3 does not support object locking for concurrent writers. If you have multi-threaded or distributed applications that update the same object concurrently, readers might get the "old" object value for a period of time. This is very well explained in the docs: https://docs.aws.amazon.com/AmazonS3/latest/dev/Introduction.html#ConsistencyModel