and uncle bumblefucks
It's a mechanics tool first & foremost. Often you're in tight spots where you simply don't have the clearance to rotate the handle a full 360 so you're going a 1/2 turn then resetting the head. With the ratchet you can zing fasteners in & out a lot quicker. I have at least 5 ratchet drivers (Gearwrench & Snap On) loaded with different bits & shafts. Does the average guy need one? Probably not. Good to have around the house but.
Guess it depends how many PC's you build a day really? If anything a small precision ratcheting driver is good for computer work. The ratchet driver has a handle the size of a #3 Phillips usually. It's unwieldy & overkill for this application.
If you're into spending Linu$ money on one buy the Gearwrench
If you're a cheap cunt that wants something that won't shit itself immediately try the Husky (this is rebranded worldwide)