[phamilton]

> nobody rewrites C code in Rust if they believe existing codebase is free of memory safety hazards

I'd offer that even if the existing codebase is free of memory safety hazards, low confidence in future changes being able to keep it free of memory safety hazards in a cost efficient manner is a motivation to migrate.

[ericseppanen]

This is so true.

The idea that a program can approach some optimal bug-free state, never to be modified or refactored again, doesn't resemble any project I've ever encountered.