Docker provides a lot more future-proof reproducibility than other deployment strategies, though. It's not 100% guaranteed, but whether a given docker image is

Docker provides a lot more future-proof reproducibility than other deployment strategies, though. It's not 100% guaranteed, but whether a given docker image is forwards-compatible doesn't matter as long as the reproducibility of creating the Docker image doesn't change substantially. In other words, as long as I can get (or make) an ubuntu:xenial docker image and apply the same (or similar) transformations to it to make the end result, it doesn't matter nearly as much whether specifically this Docker instance works across all versions of Docker forever.