How to not RiiR
Once you get past the growing pains of the Borrow Checker and realise Rust gives you the power to do things which would be unheard of (or just plain dangerous) in other languages, the temptation to Rewrite it in Rust can be quite strong. However at best, the temptation to RiiR is unproductive (unnecessary duplication of effort), and at worst it can promote the creation of buggy software (why would you be better equipped to write a library for some domain-specific purpose than the original author?).
A much better alternative is to reuse the original library and just publish a safe interface to it.