Rust is very cool. It is a language I have been waiting for since 1999

But it is not ready for critical infrastructure for two reasons:

1) It is not defined. the definition of rust is "the compiler accepts it"

2) There is one implementation

I use rust for a lot of things, things that I really want to be solid and reliable.

But I would not want to use it for systems where lives were at risk.

That is not a domain I work in, so I am hazy on what is available but I know the avionics people have systems and processes. Have they adopted Rust yet?

Rust will be excellent in this space. But it needs definition and alternative implementations first. Probably will not be long.