Generally a fan of your posts, but this one was very heavy on marketing buzzology ("cloud scale"). I can't tell if there was a genuine use case for designing a proprietary SSD, or if it were some pet project. Is "75% lower latency variability" because the first gen SSD was a CS101 project, or because AWS have developed some material edge over what others (with much wider scope) in the industry have been doing for years? I can't tell.
I can't see a reason to buy or use this product.