Many of the newer features have this problem. Like the match keyword, enums, closures etc. They are half-baked versions of what could be powerful and expressive features.

Meanwhile it seemingly abandoned features and unique selling points, like the in-built templating, associative arrays with value semantics and the fact that it integrates well with C or the simple fact that it can be used to write web server scripts very easily. To me, many of these cool features have been largely ignored or even moved away from.