Why can't this be a matter of preference? A lot of people in this thread saying "you're wrong, it DOES increase productivity!" and others saying "no, it DOESN'T

Why can't this be a matter of preference? A lot of people in this thread saying "you're wrong, it DOES increase productivity!" and others saying "no, it DOESN'T increase productivity!" It seems obvious to me that it's not necessary or sufficient for max productivity, but if it's part of your productivity strategy (or not) then great. I use a single monitor, mostly because I like being able to move around, from the desk to the couch to the coffee shop to my yard. I'm not going to bring a spare monitor into my yard. I also program in 40 character width, so that helps a lot. I can have a console, debugger, and a browser all open side by side on a single screen. If I want 6 pieces of open open side by side on my laptop I can do it easily, although I pretty much never need more than 2. I find workspaces work just as well as monitors. I have three, and I four-finger-swipe to move between them. I don't see why four finger swiping would be slower than turning my head or my eyes.