Most places I've worked support at least a couple OS versions back. Lately because of when the last device support cutoff was, it seems to be iOS 12. That's a l

Most places I've worked support at least a couple OS versions back. Lately because of when the last device support cutoff was, it seems to be iOS 12. That's a long time to have to wait to use any of this, especially given the enormous benefits and how much more efficient it could make developers. Yes, we could #if available, but that would end up doubling up the work you have to do, completely nullifying most of the benefits.