[smt88]

I'd argue that safety is vital for web software, so Rust is a candidate for "the best language" for web servers. The same is true for security libraries.

Or how about the original purpose of Rust, to rewrite a rendering engine? That's an incredibly widely used platform.

There's an OS being written in Rust that a lot of people are really excited about. There are very few languages other than C/C++ that are actually viable for rewriting an OS and would, in and of themselves, prevent entire classes of bugs.