For the preferredVerticalBarBehavior, docs say to "treat it as a stable choice: avoid changing it frequently as the user navigates, and don’t toggle it for a single view controller as a function of that view’s state. To hide the bars and status bar on a given screen rather than change the layout, use the visibility APIs instead." I'm wondering if that's supposed to apply to size class changes as well. On the simulator, Safari displays the vertical bar in compact widths but seems to set it to .disabled when in regular width (ie, the bar is in horizontal position when the app is displaying fullscreen on the inner screens). Is it OK to follow that example in our own apps?