Moving a call onto a log does not remove the coupling between two services. It moves the coupling into time, and the consumer’s spare capacity decides how much time. Take a chat app, a…

Retries and hedges cut tail latency on a normal day. Each one also sets a load above which the service cannot recover from a short stall, and no dashboard shows it. Take two copies…

Repair it, merge it, or write down why you are doing neither. A service boundary should keep paying rent. The release runbook says deploy A, wait for validation, deploy B, verify together. It has…

And what each one actually points at, which is rarely a merge. Picture two services, one team, separate pipelines for three years. Latency is fine. Neither is a hub. They fail independently, mostly. Then…