Is there any indication that Rust is not the new C++ in terms of language and ecosystem complexity? I just can't bring myself to learn languages like C++ and C#

Is there any indication that Rust is not the new C++ in terms of language and ecosystem complexity? I just can't bring myself to learn languages like C++ and C# because they are changing at such rapid and complex paces, versus other languages like F#, Elixir, Clojure that are essentially feature complete. I'd like to learn Rust, but it just seems like a huge time investment.