>50% of out engineering effort goes into Grafana - but we've already branched out into other spaces, with a team working on Metrictank (scalable Graphite), Cortex (scalable Prometheus), Loki (log aggregation) and even the Graphite and Prometheus projects.

That being said, Grafana will always treat other datasources as first class citizens, like we already do with Influx, MySQL, CloudWatch, Stackdriver, Elastic etc. This is our "un-vendor" approach.