It works. Including on me. I'm much more likely to pay attention to a tool that I know is written in Rust. This is both because I love the language and really enjoy using it, and because I've gotten conditioned to believing that tools written in it will be extremely robust, fast, useful, and stable. I can easily rattle off a dozen tools I use on a regular basis written in Rust that are significantly better than their non-Rust counterparts (starting with ripgrep, which is extremely fast). It's effective marketing still.