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TL;DR: F1 did a shed load of CFD analysis to set the rules then had a team designing to them and pointing out loopholes, which they then removed. All looks strangely well thought out and holistic compared to previous rule changes…
I think the best decision F1 has made in a long time is putting someone like Ross Brawn in charge (well, not 'in charge' in charge, but with a strong say in this sort of stuff). This definitely feels like Mr. Double Diffuser's work
There’s a good article here on how they have developed the new rules to force teams down that route:
https://www.racefans.net/2021/07/15/why-f1-face-melting-computing-power-is-the-game-changer-behind-its-new-2022-rules/
TL;DR: F1 did a shed load of CFD analysis to set the rules then had a team designing to them and pointing out loopholes, which they then removed. All looks strangely well thought out and holistic compared to previous rule changes…