Given that Pivotal wrote and then donated ownership of an entire containerised cloud platform, built from scratch, before any of Mesos, Kubernetes or Docker exi

Given that Pivotal wrote and then donated ownership of an entire containerised cloud platform, built from scratch, before any of Mesos, Kubernetes or Docker existed, I feel like we've done some fairly heavy original engineering. We estimate every story. Sometimes hilariously wrong (Diego was a classic example of a research-heavy project blasting past the initial gut-check estimates and improving in accuracy as it matured). But a lot of the time well enough to allow for useful business decisions to be made by ourselves and other members of the Cloud Foundry Foundation. The reason that I keep saying that useful estimation is possible is because I do it every single week. Hundreds of my peers in Pivotal and partner companies do it every single week. Hundreds of client developers do it every single week. But I hear that it's impossible. So I guess I'll change my résumé to read "Wizard".