As someone who spends a good portion of his workday using screwdrivers on industrial equipment and computers, I still don't understand why you'd want a ratcheting one.
It really is a matter of convenience. Linus's work is obviously mostly with computers and servers, where you often work in tighter spaces; not having to reposition your whole hand (and/or pull the screwdriver out of the screw and reposition it because of a lack of space) is a nice convenience. Plus, most computer screws are not really tightened very much, so you'll be done with a few flicks of your wrist. He also exp…
This is shown in action at this point in the video:
https://www.youtube.com/watch?v=2K5Gqp1cEcM&t=606s
In many ways, this mimics the function of a jewelers screwdriver: