That's funny, I read this affirmation (and variants thereof) rather often, but I've been using Rust on and off since 0.4 and I've always been discussing with developers who have balanced and careful opinions of Rust, starting with the Rust language and compiler teams.

Rust has never been publicized as a solution to all problems. It happens to be my current favorite language for many tasks, but I don't think any serious Rust developer harbors the impression that Rust is designed to implement everything.

That being said, the community is much larger these days, so I assume that there are users who do not have a sufficient PL background to understand the tradeoffs made in the design of Rust.