Swift has no original or new features at all. I don't want to spend too much time discussing this, but I read Swift guide[1] and even played with it in Playgro

Swift has no original or new features at all. I don't want to spend too much time discussing this, but I read Swift guide[1] and even played with it in Playground, and I'm 97% sure that every single Swift feature is borrowed from currently mainstream languages. There's a difference between "oh, it's like feature X in C#" and "well, didn't Common Lisp implement Y 30 years ago?". Feature X will be perceived as nothing new, merely catching up; Y will be seen as new, dangerous, cryptic and best avoided. I think Swift designers intentionally packed their language with Xes and added almost no Ys, exactly because they didn't want it to seem as "too new, esoteric, unproven" and so on so forth. This is a sane business decision, by the way, I just happen to dislike it.