Repercussions for potential future C flags?

As someone who came to Rust from languages like Python for the maintainability (Haskell's type system may be stronger, but its ecosystem ethos is less suitable and the GC makes it much less suited to writing modules I can also reuse in things like PyQt GUI apps), rather than the performance, my ideal world would would involve a version of WUFFS that's written in and compiles to Rust.

(So that I don't sacrifice the comfortable workflow and ease-of-cross-compilation from working on a Rust project where the only C dependency is that final link stage between the standard library and the platform libc to access stuff like the ABI stability boundary for the Windows or macOS or BSD kernels.)