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it makes sense to me...almost identical performance to the 3090 in everything but really high res and lower cost. So if Nvidia wanted to slowly kill the 3090 (a rumour I heard because it impacts their quadro sales too much) then it's an ideal solution.
Is it necessary? that's a different question.
I understand what you mean, I suppose for me the delta between the 3080 and 3090 is slim in of itself when taking into account the price difference.
Maybe it's just the nature of things now.