It is not all that is cracked up to be, you still have to know how to write software the right way. Just like in C and C++. Rust has vulnerabilities just like any other language, and thinking that rewriting it all on it to make all their security issues fade away is just naïve.

https://offensive360.com/rust-vulnerabilities/#:~:text=Different%20kinds%20of%20rust%20security,as%20C%20or%20C%2B%2B.