> Having 0.1% of the code in a safe language will not change anything, it's only a bad security blanket.

Just because something does provide an immediate perfect solution does not mean it isn't not worth investigating and/or pursuing.

Also consider that bugs tend to be more prevalent in new code (e.g., [0]) as a result, you are likely to see more of a benefit from writing new code in a memory-safe language than raw line count proportions would indicate.

[0]: https://security.googleblog.com/2024/09/eliminating-memory-s...