Right *now* its the most exciting and innovative interactive experience I've ever had in a video game. Living in the moment and not worrying about the future and it's a blast. It's truly about the journey with this one and those looking only for the destination are the people who wont get it in the first place.
Play it *now*, marvel at the tech *now*.
They don't re-write stuff afaik because the tech has been otherworldly since the beginning. Seriously, the engine is fucked!