Why do video game console discs now require installation, when we could just put them in and play instantly before? Why did PC discs always require installation

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Answer 1

One thing that I don’t think has been mentioned here is that the PS5 and Xbox Series X can do texture streaming straight off their SSDs, in essence treating the SSDs as very fast texture caches. This can’t be done with the discs. I think with DirectX 12 this should be possible on PCs but I imagine it’s still limited.