> Sometimes you can even extract metrics from logs by looking for specific log lines This looks backwards from the app dev's perspective. - Metrics are strict

> Sometimes you can even extract metrics from logs by looking for specific log lines This looks backwards from the app dev's perspective. - Metrics are strictly structured, documented data. They are a first-class output. - "Strictly structured logs" is contradiction in terms. These are just events to be sent to a pub/sub, also a first-class output. - Logs are unstructured, unknown, bleeding-edge, grey-area data, which can potentially become either metrics, or events, or bug tickets. If I output data as metrics, I don't output it again as logs - that'd be just noise. But of course other apps/systems can have a wholly different approach and force people to invest a lot into sorting out that dumpster fire. The leverage is on the producer side.