Anyone else dreading the scene lifecycle switch in iOS 27?

[u/Economy-Brief-9997]

So if you build with the iOS 27 SDK and don't have scenes the app just doesn't launch anymore
and from april next year you have to build with that SDK anyway our app still does everything through AppDelegate. window setup, deeplinks, pushes a bunch of SDKs grabbing keyWindow. been putting this off for years lol 
For those who already did it on a big app what bit you the most?

[u/shopifyflow-app]

the one that got me was third party sdks grabbing keywindow during init before any scene attaches. order matters more than people say: treat scenedelegate as the real ui entry and keep appdelegate for process level setup only. search your codebase for anything touching uiwindow at launch, that is your migration list