An example is bumper to bumper traffic moving at high speed. Traffic may momentarily slow down abruptly, then pick up again. All automatic transmissions I have driven react the same when I release the gas, and then press it again as traffic speeds back up. They either stay in high gear, so the torque is not immediately available when traffic speeds up, or worse, they take a few seconds to downshift and then lunge forward.
With a standard transmission, I can put the car in neutral when I see brake lights ahead, slow down with the brakes if necessary, and when traffic starts moving faster, I drop into the appropriate gear for the speed I'm at and the torque I need.