absolute order, you're correct. but several systems support demultiplexing an interleaved stream by some key so that order is retained for all messages in each

absolute order, you're correct. but several systems support demultiplexing an interleaved stream by some key so that order is retained for all messages in each key space (pulsar key_shared subscriptions, azure service bus sessions, etc). you're still serializing consumption / have an exclusive consumer for each key, but with global parallelism. here's the equivalent in parallel-consumer: https://github.com/confluentinc/parallel-consumer?tab=readme-ov-file#ordered-by-key https://github.com/confluentinc/parallel-consumer?tab=readme...