They used to - you needed an extra person and a bigger cockpit. Computers handle things like the pressurisation of the cabin, power systems, etc. that all used

They used to - you needed an extra person and a bigger cockpit. Computers handle things like the pressurisation of the cabin, power systems, etc. that all used to be managed and controlled by the flight engineer. They used to have a huge panel covered with gauges and controls. Generally for a lot of those tasks the computer is better at it than people... At the end of the day, this is more to do with bad system design, certification problems and lack of documentation and training about a critical system than computer control.