[1] I have almost zero experience with "grown-up" Cocoa and plenty with iOS, but assuming their factual correctness, they seem valid concerns. So you've never

[1] I have almost zero experience with "grown-up" Cocoa and plenty with iOS, but assuming their factual correctness, they seem valid concerns. So you've never experienced weird bugs because Apple added a method that had the same name as your category that did almost the same thing, but not quite? :)