Each time I read madness as 60h/w, 70h/w or the wtf 80h/w I am really happy to live and work on EU.
I think I would fall in depression really fast if I had to sacrifice (because over a certain limit, to me, it is only sacrifice) so much of my time and passion.
Also in my opinion, ever over a certain limit (For me is 50h/w), the productivity of an engineer just vanish.
I prefer work to live against live to work.