We've migrated away from the prometheus exporter to the prometheus remote write exporter as I'd like a completely "push" based architecture. Ideally I would have liked to be completely otlp but can't for the reasons already explained. So I use promethus remote write instead in to Mimir.

The transform processor could be useful if they ever deprecate the resource_to_telemetry_conversion flag, but its still a pain point because it hinders a developers autonomy, and requires a whitelist of labels to be maintained on the collectors by another team.