If you&#x27;re writing iOS apps, Swift is the language to learn.<p>If you&#x27;re writing server-side code for Linux&#x2F;OSX, probably not quite yet.  The language is nice, but it&#x27;s only been available as open-source for a day now...  the ecosystem you&#x27;d need to be productive in Swift isn&#x27;t there yet.<p>(On the other hand, if you&#x27;d like to be involved in <i>building</i> that ecosystem, now&#x27;s probably the time to jump in.)