Every time I read about new Swift features, I'm reminded of this paragraph from Aaron Hillegass's book "Cocoa Programming for Mac OS X". I don't know why.

    Once upon a time, there was a company called Taligent, which was created by IBM and Apple to develop a set of    
    tools and libraries like Cocoa. About the time Taligent reached the peak of its mindshare, I met one of its 
    engineers at a trade show. I asked him to create a simple application for me: A window would appear with a  
    button, and when the button was clicked, the words "Hello, World!" would appear in a text field. The engineer 
    created a project and started subclassing madly: subclassing the window and the button and the event handler. 
    Then he started generating code: dozens of lines to get the button and the text field onto the window. After 45 
    minutes, I had to leave. The app still did not work. That day, I knew that the company was doomed. A couple of years   
    later,Taligent quietly closed its doors forever.