I'll be interested to see how this affects warpstream... they might've just gotten a free 10x performance boost due to being built entirely on top of S3.

Co-founder of WarpStream here. We wrote a short article explaining how the economics of this new storage class work for a system like ours: https://www.warpstream.com/blog/s3-express-is-all-you-need

This such a stupid idea, because you can simply use a buffer for that if you will eventually write to standard s3. But I agree it will make money.

Super cool! I really appreciate the fast turnaround on this blog post.

Single digit millisecond S3!