LibreNMS seems to have acquired a Graphite backend/extension. It doesn't have any frontend code for it (and recommending Grafana instead), but works in parallel to their existing RRD capabilities, essentially mirroring the metrics.
Having all of the LibreNMS data in Graphite could allow us to conveniently present and aggregate data that we otherwise can't with LibreNMS, such as the power usage per datacenter (something we used to use Torrus for). The setup looks fairly easy, but it may be a little heavy on the Graphite/Whisper side of things, considering the amount of ports LibreNMS monitors. We should test and evalute that, it shouldn't take long!