For years, I’ve maintained a single “main” computer. It was the computer that was the central authority of all of the personal data I’d accumulated over the years and from which it made me uncomfortable to be separated. Because I needed a single computer for everything, it had to work on my couch, on a plane, on a desk and everywhere else I ever needed to go. Also, it couldn’t have a giant monitor or multiple monitors, because it had to go everywhere. All of this was because I needed all of my data with me all of the time.