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The problem is benchmarking on the 96 vcpu server, because at that point the author seems to miss the point of Kafka. That's just a waste of money for that performance.

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And if the OP hadn't done that, someone here would complain, why couldn't the OP use a larger CPU and test if Postgres performs better? Really, there is no way the OP can win here, can they?

I'm glad the OP benchmarked on the 96 vCPU server. So now I know how well Postgres performs on a large CPU. Not very well. But if the OP had done their benchmark on a low CPU, I wouldn't have learned this.

you're missing the point. Postgres performs well on large CPU. Postgres as-used by OP does not and is a waste of money. It's great that he benchmarked for a larger CPU, that's not what people are disputing, they are disputing the ridiculous conclusion.

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