The sentry internal metrics backend is confusing me. I see DatadogMetricsBackend and also I see DogStatsdMetricsBackend.
I see that DatadogMetricsBackend uses Datadog’s ThreadStats so it is pretty handy to avoid running the datadog agent, but DogStatsdMetricsBackend is not documented, and also the only difference I see with the Statsd backend is that DogStatsdMetricsBackend supports some additional tags.