Python cryptography, Rust, and Gentoo

> The difference is that these other two languages have a specification and alternative implementations that can keep up with each other, aren't they?

My point is that the alternative implems are *not* keeping up with each other and each new feature. I'm sure the spec is useful, but it clearly doesn't solve the problem.

> I mean, the whole reason this article exists is because Rust is special in this regard and causes problems for downstream projects. You can't really deny that, can you?
> Sure, but the problem is that this hasn't happened yet and one of the main reasons is the fact that the language is moving so fast that alternative implementations have trouble keeping up.

The problem is caused by Rust not being available on some platforms. You seem to imply that if it had a spec or evolved more slowly, rust would have alternate implementations an be available everywhere, but it's not that easy. Specs and lack of evolution don't give you alternate implementations, time does. The language isn't moving that fast, as other have pointed out. Alternates implementations don't guarantee availability on more platforms (see mrustc). And more platforms can be reached without the need of alternate implementations (see rustc_codegen_gcc).