Even when you do control the environment, infra isn’t as stable as people think.
Same VPS, same config, but under sustained load you’ll see latency creep or throughput drift depending on the host / routing / neighbors.
Short tests almost never show it — only shows up after a few minutes.
Right, and that's when you do control the environment. Now imagine debugging that when it's your customer's infra, you have no access, and you're relying on them to copy-paste logs on a Zoom call.