TL/DV: the video claims that it used to matter in the past for the best retention in the outlet. The video also says that it no longer matters, but companies st

TL/DV: the video claims that it used to matter in the past for the best retention in the outlet. The video also says that it no longer matters, but companies still make the holes because customers expect this. While this video has some interesting information about old patents, unfortunately the most interesting part ("why do electric plugs have holes today") is all speculation.