> having a decent way to get metrics from logs ad-hoc completely solves the metric cardinality explosion.

last i checked, the span metrics connector[1] was supposed to "solve" this in otel; but i'm not particularly inclined, as configurations are fixed.

any data analytics platform worth it's money should be able to do this at runtime (for specified data volume constraints, in reasonable time).

in general, structured logging should also help with this; as much as i love regex, i do not think extracting "data" from raw logs is lossless.

[1] https://github.com/open-telemetry/opentelemetry-collector-co...