I'm sorry, but Rust still has ways to go before established industries believe on it enough to drop C/C++. I use C/C++ interchangeably, since extending an existing C codebase won't be a problem. Most aren't willing to go as far as Ada either, the reason why that even in military endeavors, C/C++ is used as a more familiar "face".

I think it's pretty easy to forget the foothold these languages have, and their flexibility. We all have seen the perseverance of COBOL.

My original comment specifically said that older languages have staying power, and that Rust will have to mature a bit to become the language of choice for new projects in these niches. But even still, I wasn’t talking about dropping C++ for Rust—I only mentioned Rust as an alternate option.

No problem, I just don't consider it as an alternative for the aforementioned concerns. Nonetheless, I wasn't trying to point fingers at Rust, more of a pragmatic approach to modernizing a code infrastructure.

I hope Rust does well.