I don't think that's going to save them. There are big problems and little problems. RAII+ownership/borrowing solves some memory and file handle issues. But the big problem and this happened before the rewrite, is that they have ceded the system level. Which locks the project into a local minima.

It's not a "your holding it wrong" problem it's a you fundamentally have no idea how your own program works past 1 or 2 level of indentation in most places. If the LLM says that something isn't possible you just have to take it at it's word.