Fair enough. My point is that Docker makes packaging up the various services I need to deploy much easier and more predictable. Now, rather than spin up three

Fair enough. My point is that Docker makes packaging up the various services I need to deploy much easier and more predictable. Now, rather than spin up three EC2 nodes to be Kafka instances, I just use fleet to submit three Kafka units and it finds available resources among my existing CoreOS cluster. If I need more capacity, I spin up more generic CoreOS instances on EC2 and fleet starts using them. The groundwork is being laid and I think we're going to see a lot of competition in Heroku's space. Given the price difference between Heroku and EC2 (much less DigitalOcean) I think there's a lot of profit margin for competitors to attack. That's Heroku's weakness: it's easier than ever to build the equivalent functionality.