so far we've had little need for persistence in pubsub, for the few places we do, we have used oban the same way you have. It would be easy to pull in a library like Yggdrasil and abstract it away. For the most part, we just haven't needed it enough to justify setting up rabbitmq or kafka. k8 is indeed useful but the benefit of elixir here is that I can setup the supervision tree in pure elixir. By keeping things simple, we've been able to focus on pushing out features instead of worrying about infrastructure.