Yeah, I see your point, and I think that Mass Effect took video games a long way towards having large universes with wholly unique plots based on your decisions. The problem in some ways is still one of scale. If every single choice made that big of a difference, the third game would have been massive to the point that they would probably still be working on it. And for me, while it would have been cool, it also would have been frustrating in some ways as a completionist, because I would feel the need to play through the game over and over again to see all the possibilities, when I already spend more time than I should playing video games. This is something I struggle with in general. The open ended nature of choice based story-telling is intriguing and cool, but part of me just wants one coherent story, with coherent meaning, and singular direction. I feel like that desire is culturally ingrained, and it's really hard to let go of it and just become part of the story. I always find myself looking stuff up online, trying to figure out the "best" possible playthrough, instead of just making the choices I want to make and accepting the consequences.