The website seems to be unavailable. I don't know if the language is any good.

There is definitely value in a language that is easy to move to from C (and C++) that is memory-safe and performant. Most vulnerabilities involve memory safety today (the top 3 CWE categories of exploited vulnerabilities are memory safety). Rust is a good language, but no one has the trillions of dollars necessary to rewrite everything currently in C and C++ into Rust. Some programs can be rewritten in other languages where performance is less important, but that is not always true. That said, something may be desirable, but it may not be doable.