I have a production app in the AppStore in 100% swift 2.2. To me it&#x27;s the most exciting new language out right now. It does not have too many brand new features that other languages don&#x27;t have but it&#x27;s implemented most of those modern features in a very solid robust easy to understand and use way. It&#x27;s functional but not purely, it&#x27;s object oriented but has great ways to avoid the worst of the designs most of us have been bitten by in the past. We are in a Java, PHP, Node.js, and Swift shop. Swift is BY far the least bug prone and most stable code. It&#x27;s fast and easy to understand.<p>It&#x27;s not perfect, Generics and Protocols are fuzzy at best and if you aren&#x27;t careful with optionals you can actively harm the stability of your code base. It has a long way to go on the server side but I do believe that it will and should be a great server side language platform. That said in my opinion it&#x27;s the best language I&#x27;ve worked with professionally.<p>For reference I&#x27;ve professional written a decent amount of code in:
Python
Java
C#
C++&#x2F;C
Objective-C
Perl
PHP
Node.js&#x2F;JavaScript
VB6&#x2F;VB.net
Ruby
Groovy
Scala