I don't think the models are dumb anymore, codex with gpt5 and claude code can design and build complex systems. The only thing is these models work great on gr

I don't think the models are dumb anymore, codex with gpt5 and claude code can design and build complex systems. The only thing is these models work great on greenfield projects. Legacy projects design evolves over a number of years and LLMs have hard time understanding those unwritten project design decisions