Good point I think it needs to also be explained that the biggest mistake before the stall and what some will say poor airmanship was the pilots lack of understanding how the Ice speed switch work. For the q400 when the airplane was in icing conditions the crew was required to put a switch on that increased the speed that one would get the stall indication. When one had this switch on they were also required to increase the vref speeds by 20 knots also. The crew had the wrongs speeds set. The crew was on profile flying the aircraft like they should be but because the switch was on got the stall indication at a higher speed so he was not ready and his lack of readies is what led to the unfortunate incident. What is not really mentioned is that this very same situation happen the very next day after the crash where the crew forgot that the speed switch was on and bug the wrongs speeds and got the stick shaker but lucky a check airman was on board in the jump seat. The 1500 hour rule just like far 117 would not have prevented the crash. You still have pilots commuting across the country for work, you still have people sleeping in crew rooms what has change nothing. The only airline that has do e anything to make sure their pilots are well rested before a trip is commute air who gives people hotels the night before a trip.