I've seen many languages with mix and match syntax differences and feature sets that didn't bring anything significant to the table. Rust is not that. It has memory safety while having memory efficiency, high performance, good package management, easy interface with C FFI, and excellent support for parallelism. The list of things it gets "right" from my point of view dwarfs other languages-du-jour.

The biggest downside IMO is you have to get people past some conceptual hurdles before they can be productive with it. (e.g. the borrow checker) Despite how often you see it come up on HN, it doesn't have a powerful marketing force behind it. It also doesn't fit the trend of turning developers into commodities by being as easy as possible.