Thats not a complete reasoning. Even frontiers need to revisit and fix things. Add 10 loops to that and it is 20 hours. Still great compared to a 2023 human, but why am I not just paying pocket money for Claude Pro instead?

You're talking about agentic workflow. Agentic is cruise controls. Race car drivers shift manually for more precision and to go faster. If the only way you know how to code with AI is agentic, then you are putting yourself on a crutch.