In 2021, Coinbase paid Datadog around $65 million. Not for infrastructure. For watching it. The number surfaced on Datadog’s own earnings call, and the industry’s reaction was telling: not “how absurd,” but “how do we get a customer like that.”
That’s the observability business. It sells three pillars, metrics, traces, and logs, each with its own pricing meter. And somewhere along the way, the three pillars stopped being a product tier and became a definition of professionalism. Teams of four now feel negligent without distributed tracing.
Look at what each pillar is actually for. Traces follow a request across dozens of services, because no human can. Metrics compress logs that have become too voluminous to read. Dashboards give forty engineers one shared picture of a system none of them fully knows. All three exist for bigness: tools for understanding systems that outgrew understanding.
Your system didn’t. In a monolith on one box, the trace is a stack trace with a request ID on it. The latency percentiles are sitting in your request logs’ duration field, one query away. Error-rate alerts derive from the same lines. The shared mental model the dashboard sells? You have it, in your head, because the system fits there. You’d be buying X-ray glasses for a body you can see.
The title oversells by two small items, so let’s be exact. Dead servers don’t log: you need one external ping that notices you’re gone. And a full disk kills logging first: you need one disk alert, plus logrotate, which has been capping disks since before observability was a word. Keep a week or two of history and compress the rest away. Almost every question you’ll ask your logs is about the last few days, and logs you no longer have are logs nobody can leak.
Logs, a ping, and a disk alert: the complete tower at your scale, and notice there’s still not a pillar in it. What you’re deleting is the industry, the metric pipelines and trace collectors and per-host pricing, not the last two percent of safety.
You don’t need three pillars to hold up one box.