Deprecation warnings are a huge issue in 3rd party libraries. You'd have to rewrite those the way iOS works basically if you do turn on "Warnings as errors". I

Deprecation warnings are a huge issue in 3rd party libraries. You'd have to rewrite those the way iOS works basically if you do turn on "Warnings as errors". I wish it were not so, but sadly, it is. On projects who don't have this problem, I turn it on.