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Yes; and the rewrite can take into account the logic used in the old code (especially in the security-critical areas) as well as all the vulnerabilities that have happened before. You're not starting from a complete blank slate; you can pick up the lessons learned.

Despite being "battle tested", all of these C programs continue to have both memory and logic errors. I think a rewrite would have the same rate of new logic issues after the initial code review and testing. "bugs will always exist" -- sure, so if we have something that eliminates a class of bugs, why not use it? The other classes of bugs will be there (and probably in the same force) whether you rewrite or not.

A lot of these bugs get introduced due to cruft in old code as well. So there are a bunch of tradeoffs here.




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