It's not even just your users. I work on a S3-compatible service where a good chunk of the test suite is built on the AWS SDK. In reality, AWS are the referenc

It's not even just your users. I work on a S3-compatible service where a good chunk of the test suite is built on the AWS SDK. In reality, AWS are the reference S3 implementation. Every other implementation I've seen has a compatibility page somewhere stating which features they don't support. This is just another to add to the list.