As someone who hasn't been following the situation super closely, can someone help me understand why the coreutils rust rewrite keeps encountering issues when the coreutils code is open source?

I'm struggling to understand why there's been so many bugs/issues with the rust coreutils rewrite. We have all of the original C coreutils source code available to us, AFAIK it should be possible to start with the entire code base in C and incrementally port it over to rust.

I understand it's a large repo/project and there might be some issues, but I would like to believe that these would be small issues that are reasonably easy to fix quickly.

Reason for post: https://www.phoronix.com/news/Rust-Coreutils-cp-Ubuntu-Images