As for the 'rewrite it in Rust' thing...

Depends on what you are rewriting from.

C, you have memory issues, but battle-tested code.

COBOL, you have to hire retiree consultants for $BIG.

Or, twenty years from now, hire psychics for $BIG to communicate with them.

I wonder if some of the RIOR is about worry over C being the next generation's COBOL?