title: What exactly does Apple documentation mean by "scene support"?
body: <p><a href="https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle" rel="nofollow noreferrer">https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle</a></p>
  <blockquote>
  <p>Scene support is an opt-in feature</p>
  </blockquote>
  <blockquote>
  <p>Apps must explicitly opt in to scenes, which you do by updating your app’s configuration settings.</p>
  </blockquote>
  <blockquote>
  <p>In iOS 12 and earlier, and in apps that don't support scenes, UIKit delivers all life-cycle events to the UIApplicationDelegate object.</p>
  </blockquote>
  <p>However, apps by default, which aren't opted in, have a scene delegate and receive all life-cycle event reporting through the scene delegate (not the app delegate). This contradicts Apple's documentation, which wouldn't be the first time. Shouldn't the documentation instead state that <em>multiple-scene support</em> is an opt-in feature?</p>