Swift is now one of the top 10 programming languages, replacing Objective-C.

What is amazing is how fast Swift has become mainstream, faster than any language before.  

https://www.wired.com/story/apples-swift-programming-language-is-now-top-tier/

Further reading: http://appleinsider.com/articles/18/03/09/apples-swift-rises-into-top-10-programming-languages-swapping-places-with-objective-c