fastners 'camming' out is as much an issue with quality of driver and fastners. For industrial use driver bits are hardened and/or tinite (ceramic coating not just gold paint like cheap stuff). Canadians screw better than anybody
Robertson square driver screws and drivers , excellent quality.
I remember when the first DeWalt impact drivers came out they were amazing , far greater driving capacity without camout , use to demonstrate them driving slot head screws into hardwood.
With proper electronic chargers battery can go on charge at any time , without memory effect , remember not to fully discharge ni-cad as the cells are damaged.
Torque not adjustable per se , a clutch will limit torque and torque lower at low speeds, both types of drill have variable speed triggers , corded often have speed control as well , once again quality varies.
Panasonic was the other brand , the best batteries by a mile especially with NiMH.
DeWalt and Makita produce good product but all companies have there strengths and weaknesses , the biggest problem is finding a salesperson who bothers to learn the detail.
Almost as much technical detail in tools as there is in home theatre !