> What the hell is there to complain about, would you rather work in 50+ year old cobol?

I'd rather work on modern AND stable language (I actually do, its not Swift, buy that's not my point). Broken code samples is a good reason to complain. Swift is a moving target, it will be for a while, and this is real pain... but its not a secret. If it bothers someone, why would they choose to use it?