There are tools to make C safe and for some industry use this will work. I also agree that rewriting in Rust is often a mistake.

But NSA is already advising against the use of C: https://www.nsa.gov/Press-Room/News-Highlights/Article/Artic...

And the EU is working on new liability rules. Yes, Airbus might be able to get around this. I am more worried about smaller companies or products including open source.