I think you're right that the biggest technical reason is local storage. But I disagree about the difficulty of streaming. When properly implemented it comes wi

I think you're right that the biggest technical reason is local storage. But I disagree about the difficulty of streaming. When properly implemented it comes with the huge advantage of drastically reducing install/patch/load times as well. Engine developers have been lazy and allowed install/patch/load times to get totally out of control. I think the game industry has been ignoring the huge benefit that reducing those times would bring them even on traditional platforms.