None . I shoplift regularly . <| sep |> Wait . there ' s a Kendall variant for zombies ? I don ' t see it in the armory <| sep |> Nothing changed but the wording and numbering the numbering is more coherent , which is good , and the increased time between stable releases . Basically yes . It is more clear that the development time for the new API is long and typical developers shouldn ' t target those until X . 0 when it is considered stable . During the period to X . 0 people should use X 1 which was already stabilized and will be maintained . I think this is a very sane system that is easy to understand and a clear improvement over 3 . Y where the intentions of upstream was less clear and the time frame was equally vague .