When you have something your throwing into a dedicated space and limited use case like a car, being able to fire and forget and just leave it there with the common bits it might need is nice. Your not using it frequently enough to be particularly worried about the additional failure points, and it staying all together is perfect since that things gonna be tossed outta the way constantly for years because you don't usually need it. Can't lose half of it when its all together.
But the use case falls apart entirely when its a primary driver, a tool to cover all your needs that you deliberately grab for a specific use case. I have never needed to suddenly unscrew a computer three hundred miles from home right this absolute second - I can walk over to my little tool stack in the cabinet and take out my driver with its array of bits. The MerchFucker9000 is probably the worst ergonomic situation for its use case, worst accessibility, worst storability (That fuckers gonna roll away) and excessive complexity for what it is. The only explanation for its existence is someone got high, opened fusion 360, and did a cut and mirror on the handle design and thought they were gods gift to the world.