This happened with me, and I thought to myself "how does this work? How am I still as productive as before?" And I tried to recall what life was like in the office. Turns out a lot of my time was spent trying to look busy, rather than actually being busy. It's not like I was Peter Gibbons from Office Space, I wasn't lazy or jaded. But sometimes my brain just wouldn't do what I needed it to do. And instead of doing the correct thing, which is stepping away from the computer and taking a walk, or doing the dishes or whatever, instead I just sat there and mimicked my working routine. Tons of wasted time, wasted potential, and yet it still drags on your energy just as if you were actually working. All of that was because of the social pressure due to being physically in the office.