On the same boat, and honestly, it’s not getting the attention it deserves. Given Databricks acquired ElectricSQL primarily for PGlite, the Durable Streams project is likely going to be abandoned unless new maintainers step in.

I did, in fact, initially write PicoMQ with OpenRaft, similar to Ursala, but I really wanted the operational complexity to be minimal and the nodes to be stateless (at least for most use cases), Pico uses SQL database as a metadata command log, inspired by RisingWave.

But Ursala would, without a doubt, have better durability ACK latency, as it wouldn’t have to wait for an ACK from S3. That said, I do plan on extending disk/EBS-staged WAL to hit similar low-latency durability ACK numbers. But again, most use cases don’t need single-digit-millisecond latency for ACKs.