Because your Xbox is basically an 8 year old computer, that was underpowered when it hit the market back in 2013....and now it and PS4 are wheezing under the strain of trying to run this game. Bungie had to abandon the PS3 and Xbox 360 in Y3 of D1 because the game got too big for those machines to run it. We are approaching that point with the current consoles....but those machines ARE the market. So there is no more powerful machine to run to that will allow them to just keep adding more stuff to the game. The machines are a problem because this game has no dedicated servers to run the game. So everything you encounter in the game has to be stored on----and run FROM----your console or a console that your machine is networked to..... and your machine has to run the network too along with the game. If you want to see the problem in a nutshell. Go play a round of Gambit on console.....and watch what happens during the boss fight. At that point, your console is trying to run the game that you see on your screen. Plus keep you networked to 7 other consoles in the lobby. Plus keep track of what's going on in the game on those 7 other machines...plus keep them all synced up and preserve the illusion that its a single game world. So the game "bottlenecks" because it overloads the processor on your console and it cant keep up. So you get framerate drops, stuttering, rubber banding....and all the other problems that are just an accepted part of the experience of playing Gambit. That's what happens when you SLIGHTLY exceed the limits of the machine, for a BRIEF period. But if you push the game massively beyond its limits----by continuting to just add more and more and more to the game----you'll eventually just crash the console...and the game won't run.