Eli5: if the Xbox series X and PS5 can both do 4K120fps, why do we still see performance and quality modes instead of the high resolution and framerate?

Question

Eli5: if the Xbox series X and PS5 can both do 4K120fps, why do we still see performance and quality modes instead of the high resolution and framerate?

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Answer 1

they can support 4k 120fps in theory but just very simple games in that resolution and framerate simultaneously. So if some game really can achieve both at once you can bet it is some 2d platformer.