If it's a choice between taking bungie at face value for this assertion (that old gen hardware is too weak for substantial vault expansion) or assuming that I'm being lied to for some nebulous reason, sure.

In my opinion it is common sense that it is easily possible, but I have a background in IT. More than that, what inclines me to disbelieve them is their history of blatant lies concerning this game. Many of the things they've lied about are beyond dispute. Examples: 1. In October DeeJ took the mail sack out of the weekly updates, stating that it would return soon, when they were less busy. It's never returned. Obviously they just don't want to respond to our questions. 2. 3 Iron Banners ago we were told that Asylum, The Burning Shrine, and Anomaly were added to the map rotation. They didn't appear until the last Iron Banner. 3. They've claimed multiple times that they didn't cut content from the game, despite the fact that most of the areas in House of Wolves were being glitched into during the Beta, and there's video of the Reef social area from like a year before launch. etc etc. My point is, they've lied so many times that they don't deserve to be taken at face value.