If you ever need to abort t.o. after a severe engine failure at very low speed or at any speed with a 38 kts crosswind, you will need to use full rudder + differential braking immediately if you want to keep it on the runway!
Autobrakes will not help you to keep in on the runway! Worse: you WILL be giving hard and full rudder instinctively and from that moment on it becomes very difficult to move that foot up to brake!!
At low speed Auto brake wouldn't work to start with and stopping is not critical but keeping it on the RW is. There was a RW excursion because differential braking could not be applied although due to improper seat adjustment the toes could not reach the deflected rudder top. But even with proper seating it's difficult to slide the foot up after full rudder application. It is very easy to do that if you place the feet on top.