I think you'd be very hard pressed to scale an Elasticsearch cluster to 10s of millions of writes/s without breaking the bank (and even if you had a pile of mon

I think you'd be very hard pressed to scale an Elasticsearch cluster to 10s of millions of writes/s without breaking the bank (and even if you had a pile of money to light on fire I don't think an Elasticsearch cluster with the number of nodes you'd require to support that would work very well). Elasticsearch is a great piece of technology and its very versatile which makes it a great fit for a lot of problems (Uber, where M3 was developed, is a heavy consumer of Elasticsearch for logging purposes for example), but for the types of metrics workloads and scale that M3/Prometheus were designed for Elasticsearch simply wouldn't work.