As per Microsoft, they apparently saved 2 GBs of RAM by preventing productivity apps (bloat) from loading in their Big Picture mode. Now, it's another entirely different thing about how they are handling CPU/VRAM for the games. Let's see how that goes.

There was a Youtuber who showed that Windows is bloated, not because of background apps, but because of not using CPU properly (incorrect governor settings). The Youtuber used a script to set it right and windows got a boost in battery life. This kind of makes sense because I've seen none of the "bloat-free" Windows ISOs provide a significant performance boost over the standard OS.