Or a minor alteration to an existing program to support a good suggestion.
Why is it that the Rust community thinks that the solution to every flaw in an application is a rewrite in Rust?
Programs these old are controlled by people who are very strongly opposed to change, even if it improves things. They like living in the 80s.
I absolutely guarantee if you propose this change the the GNU neckbeards who control man they will come up with some bullshit technical reason why it can't be done.
It might be more helpful to write a Rust-based snark detector first.