Agree in principle (you shouldn't rely on shutdown sequence to do correct thing). It is still nice to have a grace shutdown option. For some cases, it is just a

Agree in principle (you shouldn't rely on shutdown sequence to do correct thing). It is still nice to have a grace shutdown option. For some cases, it is just a little bit "nicer". Imagining you have one service instance need to shutdown for either migration or maintaince, it is just a bit nicer to report to your service discovery manager that this instance will go offline. While service discovery manager will eventually figure it out by its own through heartbeat monitoring, proactively notifying the service discovery manager would reduce a little bit on the failed retries etc.