[chalcolithic]

I wonder if there's an embedded equivalent for such systems? Something like fasterlog but more mature?

[alexisread]

You could try nats jetstream https://docs.nats.io/nats-concepts/jetstream

I've found nats to be very lightweight, and it can bridge (bidirectional) to kafka.

Edit: Oh it also supports websockets to the browser

[agallego]

When you add compaction, indexing, recovery, tiered storage, etc. some things become harder to reason about wrt systems resources if you are embedded.