Yeah, in particular, you can write libraries in Rust, which can be used in virtually any other programming language, similar to how you can do in C and C++. And given that not a ton of young kids learn C/C++, there's a chance that the majority of important cross-language libraries (like OpenSSL, SQLite etc.) are written in Rust in a decade or two.

You're still using BLAS if you really need high-performing matrix calculations tho'