> produces better results than just... talking to one strong model in one session?

I think the author admits that it doesn't, doesn't realise it and just goes on:

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On projects where I have no understanding of the underlying technology (e.g. mobile apps), the code still quickly becomes a mess of bad choices. However, on projects where I know the technologies used well (e.g. backend apps, though not necessarily in Python), this hasn’t happened yet

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