Cumulonibus a few minor corrections to your post I was six when I became interested in flying and the Vanguard was still a paper airplane. As for flying a desk that will come soon enough after 40 years all good things must come to and end .As for rostering long haul and ultra long haul have very serious fatique issues with no simple fixes as anyone who has done it will atest . Short and medium haul have their own fatique issues. The point is no matter what causes the impairment you are impaired. In my humble opinion fatique is a much more serious impairment issue than alcohol ever was . Should you go flying with alcohol impairment of course not is it even a minor problem in western aviation no. Dont try to tell me at 3 am body clock on a 10 hour trip you are not fatique impaired I have been around to long. Try reading TDK mk2 post we have all been there and that includes you I suspect. After that read some of the NASA research