This would be a better page to link to https://github.com/esengine/DeepSeek-Reasonix/blob/main/docs...

They explain some of the the reasons why they have a better solution and why they are very opinionated

>Automatic prefix caching activates only when the exact byte prefix of the previous request matches. Most agent loops reorder, rewrite, or inject fresh timestamps each turn — cache hit rate in practice: <20%.

So they optimize on this plus other techniques to improve cache hits, making it cheaper.