Funny thing is it isn ' t even good optimization . FO 4 chugs like crazy on XB 1 . Now now , we cant say that without comparison to WITHOUT the optimization . And , since even we on PC with our mighty rigs get tanked performance without it , just imagine the poor consoles . They need to redo the entire engine , build that fucker from the ground up . Still using the Frankenstein ' s monster that is the Creation Engine , born from Morrowind , is crazy . Can everyone stop acting as if bethesda is doing anything different from any other game company ever ? Nobody rebuilds their engine from the ground up for no reason . They reiterate , they improve the last generation . Thats how they all work . Not unless they have a very good reason do they do that . Bethesda ' s problem is they dont prioritize upgrading the engine enough . Of course , if they did that , other areas of the next game may end up lacking .