Well that’s a very valid argument. If cost and impact of an error is very high and a rewrite mitigates that, sure, why not rewrite it. But in this comment thread I had to offer this argument myself, I haven’t really seen it properly communicated.
It’s always — memory safety this, error handling that… These are good reasons to pick a language for a new project, but, god damn, it’s a stupid reason for a stable program rewrite (let’s say the program is mostly in maintenance mode: no major new features are planned; correct me if that’s not the case for sudo).