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The article mentions it is not a limiter, but rather a speed limit warning. So none of your hypothetical scenarios apply, other than drivers might learn not to overtake if breaking the speed limit is necessary because the warning is annoying.

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It does limit engine power but I see further down there's an emergency override (by pressing hard on the accelerator) which would get around these issues.

I'm curious about this user experience and whether most people would be comfortable with it, especially while merging.

When I press hard on the accelerator to cancel a speed limit, does the car accelerate hard too? Or is this signal trapped for the cancel operation?

This is only of the options which are being evaluated, there are others which amount to only warning.

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