Good to know!

But even if it’ll become available in 2 months, it’ll take some time to develop Rust libraries on top of them.

E.g. in various performance-critical C++ projects I have used https://github.com/Microsoft/DirectXMath and https://eigen.tuxfamily.org

Both are quite large projects with many man-years spent to develop, they saved quite a lot of my development budget.

Yes and no, a lot of libraries have been built on top of the feature while it was unstable. It’s been in nightly for quite a while at this point.

Of course, more libraries are needed as well, but there’s already some higher level stuff. See https://github.com/AdamNiederer/faster for example. And const generics, coming to nightly near the end of the year, will be another step up. It's true overall that numeric stuff is a weakness, but we'll get there!