>> Yes, you can use it everywhere. Is that what you consider a success?

> ... yes?

Then perhaps you and I define success differently? As I've said in other comments above, C persisting or really standing still is not what I would think of as a winning and vibrant community. And the moving embedded and kernel development from what was previously a monoculture to something more diverse could be a big win for developers. My hope is that competition from Rust makes using C better/easier/more productive, but I have my doubts as to whether it will move C to make changes.

Sometimes it's nice to know that something will run and compile reliably far into the future. That's a nice thing to have, and wide support for the language and its relatively unchanging nature make it reliable.

> Sometimes it's nice to know that something will run and compile reliably far into the future.

I'm not sure why you think this is a problem that Rust has? Perhaps you mean something different but the Rust project compiles available code on crate.io upon the release of a new version.[0] C compilers may imagine their new compiler code doesn't break old software, but Rust takes that extra step, so we know it won't.

[0]: https://github.com/rust-lang/crater