I agree that the short nature of these games is good. It's found a way to mesh the open world post-Apoc experience with a short timeframe, loot/craft then fight mechanism. As much as I like the concept of open world survival/combat games, they tend to be really time intensive. I just don't have that kind of free time in one sitting. Games like this kept some of the fun elements of that, but condensed it. If that happens to be great for Streamers, awesome, but I think of that more as a byproduct than the number 1 reason for its success.