Well, everyone might not do it, but it does provide another option for a certain class of apps. People write cross-platform games with C++ and OpenGL, for example.  Hopefully Cocos2d gets ported to Swift:<p><a href="https:&#x2F;&#x2F;www.kickstarter.com&#x2F;projects&#x2F;1455832115&#x2F;cocos2d-pureswift" rel="nofollow">https:&#x2F;&#x2F;www.kickstarter.com&#x2F;projects&#x2F;1455832115&#x2F;cocos2d-pure...</a>