[cyen]

Totally, if all you care about is just that counter/gauge -- but more and more often, you need that counter/gauge captured for a particular segment of your traffic (e.g. some app-level identifier), and TSDBs tend to struggle[0] as the number of possible segments explodes.

If all you care about is overall latency, awesome! Use a TSDB. Once you care about latency per endpoint/user agent/customer ID/client platform (or combination thereof), you need the flexibility associated with structured log data, stored in something meant for fast analytical querying.

0: https://www.honeycomb.io/blog/the-problem-with-pre-aggregate...