From another comment below, it's just a nice short title to convey that we're going back in time and not one to set your watch by. We first submitted the a

From another comment below, it's just a nice short title to convey that we're going back in time and not one to set your watch by. We first submitted the article to the CACM a while ago. The review process takes some time and "Twelve years of Docker containers" didn't have quite the same vibe. (The CACM reviewers helped improve our article quite a bit. The time spent there was worth it!)