Jerryโs update did represent a significant restructuring, in order to better incorporate modern features like stack views. While we do work with iOS 11โs Safe Area Layout Guide in this update, and iPhone X previews in Xcode, the biggest difference is stylistic. For example, we have challenge videos now! And everything has been broken down so that the videos are smaller and more focused. This represents what weโll be doing with all our courses, going forward.