So, maybe we agree? Because I'm not disputing (and never have) that the message broker is the place to do that. But you seem to be conceptualizing the message

So, maybe we agree? Because I'm not disputing (and never have) that the message broker is the place to do that. But you seem to be conceptualizing the message broker as a separate _service_ or application, and I'm saying it's just a function, a role. It doesn't matter so much what particular process (or group of processes) it runs in. That's what I meant by "internalize".