I think it’s a good point actually. I think it’s reasonable to say swift isn’t intended as a language to experiment with a specific concept, it’s a six year old production language designed for a general set of usecases where it’s good at a bunch of things that the languages it is replacing weren’t as good at. There’s some interesting discussions to be had about tradeoffs it makes but a question like “what’s the one thing swift does that other languages don’t do” is not the right way to evaluate a production language. It might explain why some people don’t find it interesting but swift was built to be a better tool, not merely an interesting one.

A lot of really good programming languages are “uninteresting” in this way, and that’s probably a good sign, not a bad one.