I'd say PicoMQ is close to being fully serverless, since nodes are stateless. But would miss out benefits of batching, caching and low-latency. S2-lite is pret

I'd say PicoMQ is close to being fully serverless, since nodes are stateless. But would miss out benefits of batching, caching and low-latency. S2-lite is pretty cool, but it's single-node only and built on SlateDB. So, PicoMQ is closer S2 Cloud.