Interesting, as a self-contained minimalistic setup.

Shouldn't one be using a storage system such as S3/garage with ephemeral settings and/or clean-up triggers after job-end ? I get the appeal of using one-system-for-everything but won't you need a storage system anyway for other parts of your system ?

Have you written up somewhere about your benchmarks and where the cutoffs are (payload size / throughput / latency) ?