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A lot of the article has to do with Respawn's origins, actually.
So here's the exclusivity mention: They thought working on PS4, Xbox One and PC would prove too difficult for a small team, so they decided to focus on one console instead of two. (er...). "Not to say we won't [go multiplatform] in the future, but for our first game we wanted to focus on making the best game we could."
GI points how that the Xbox One has 5GB of GDDR3 ram available to devs, whereas PS4 has 8GB DDR5 ram, and asks if that's a problem for Respawn. He says they're having trouble even using the 5GB efficiently with all the new architecture tricks. (that is to say, even if they had 8GB they wouldn't know how to use it properly at this stage of development)
GI: "What XBox One lacks in RAM, it potentially makes up for in cloud computing." Talks about how the game will have unlimited dedicated servers for the game, offloading "a few dozen AI" and physics, says the game would be impossible without the cloud and wouldn't have attempted it. Still dealing with unfinished hardware and software, so it's "still a little rough going at times."