I'm confused on why the need to complicate something as seemingly-straightforward as a KV store into a series of queues that can get all mixed up. I asked ChatGPT to explain it though, and it sounds like the justification for its existence is that it doesn't "block the event loop" while a request is "waiting for a response from Redis."

Last time I checked, Redis doesn't take that long to provide a response. And if your Redis servers actually are that overloaded that you're seeing latency in your requests, it seems like simple key-based sharding would allow horizontally scaling your Redis cluster.

Disclaimer: I am probably less smart than most people who work at OpenAI so I'm sure I'm missing some details. Also this is apparently a Python thing and I don't know it beyond surface familiarity.