And docker-compose is really killer. You can switch between whole stacks of variously-versioned things for projects on dev machine very quickly. Docker-compos

And docker-compose is really killer. You can switch between whole stacks of variously-versioned things for projects on dev machine very quickly. Docker-compose down && cd otherproject && docker-compose up Way easier than VMs or localhost version-handling ever was. You dont need co-existing postgres's, rubies, pythons, nodes, etc stepping on each other's toes.