As an experienced ObjC programmer, Swift allows me to expose the foundation of my code far more rapidly, and in a much more stable form. It forces me to answer

As an experienced ObjC programmer, Swift allows me to expose the foundation of my code far more rapidly, and in a much more stable form. It forces me to answer critical questions about my software that I would often postpone indefinitely in ObjC. It makes refactoring feel much more safe. I like plonking down some quick ObjC, but my Swift programs feel much, much more correct. (Of course, when dealing with C APIs, Swift is downright nauseating.)