I meant that it can be called a learning experience to justify further development. Besides, Rust is genuinely useful. I can't be the only one who is interested in (eventually) using it as my go-to language for my projects.
Personally, once Rust stabilizes as a language, I plan to write the bulk of my "low level" at-home code in Rust. After tooling support gets up there (providing things are still awesome), I plan to use it professionally.