[RazrFalcon]

Yes. C++ has all of this in a crippled form. But it doesn't mean that C++ in on par with Rust.

[pjmlp]

Not from technical perfection point of view, but it is much easier to improve existing codebases than just rewriting the world.

One of the things Rust should focus on as productivity improvement is making that migration as easy as possible.

Right now I cannot justify from business perspective replacing C++ with Rust on the workflows we still use C++ for.

[RazrFalcon]

I'm not saying that you should ditch an existing C++ project.

But it doesn't mean that C++ as good as Rust. It's just wrong.

[pjmlp]

A programming language is not just a grammar and semantics.

The whole eco-system and community around a language is what defines it.

To give a more explicit example, until it reaches parity with C++ on .NET/UWP tooling, it just means less productivity in spite of being a technically better and safer language.