To me, the most interesting empirical result of the Swift language evolution so far is the lack of urgency on language-level concurrency.<p>If they think they can be competitive for years (at the very least vs. Objective-C) with only platform-level concurrency support, it makes me wonder whether concurrency is generally better provided by the platform instead of the language for most needs.<p>Conventional wisdom would have it that for a systems &amp; application language designed in 2014, a good concurrency story would be close to job #1.