There is an effort to use arrow format for metrics too - https://github.com/open-telemetry/otel-arrow https://github.com/open-telemetry/otel-arrow - but no clie

There is an effort to use arrow format for metrics too - https://github.com/open-telemetry/otel-arrow https://github.com/open-telemetry/otel-arrow - but no client that exports directly to it yet.