It depends on what one's idea of an implementation is and what one's expectations are. If an implementation is "a black box that works," absolutely, LLMs are f

It depends on what one's idea of an implementation is and what one's expectations are. If an implementation is "a black box that works," absolutely, LLMs are fine. They can create complex programs in full. But if one expects a tight implementation... it's a horror. LLMs vastly overengineer code (I believe they're intentionally designed to do so). I really struggle to make LLMs generate lean code. In the best case, they generate bloated designs (in terms of complexity, not necessarily performance), but in the worst case, they generate gaps in the specification. And even in the first case - cognitive load is a problem also for LLMs, not just for humans (although obviously at a larger scale). I think LLMs are essentially modern compilers, with similar problems, but designed more like "deoptimizing compilers" than optimizing ones. :)