The point is, They announced garbage collection and then deprecated it only a few years later. Meanwhile traditional manual memory management which is like 25 years old, that's still supported.
So the odds are, the course of action you're proposing ... it would have lead to TWO big development efforts, one to switch to GC, and one to switch back, and there would be a big debate about whether to go back or forward. For what? And I've been working on Swift code for the last two months, half of which has been converting Swift 2 code so it'll be more likely to automatically convert cleanly when we pull the Swift 3 switch. So, no, MRR isn't going away any time soon, and Objective C isn't either.
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