It's garnering downvotes because a lot of HN readers have never worked with a very large and mature codebase before and understand just how crazy a migration is. They seem to think that writing in Rust magically eliminates most bugs. No... it eliminates certain classes of bugs but instead you get plenty of logical bugs.

The number of new bugs introduced in a migration would be enormous. It's not just "translating" the C into Rust-- you ideally need to write "idiomatic" Rust.

Rust is a fantastic language but what I despise about its community is how they seem to think every C/C++ codebase should be rewritten in Rust. Either it's a monumental effort or it would decrease the developer base in many cases. In the case of C++ template libraries then it's in some cases even impossible to replicate functionality.