I've been through a few 'crunch modes' before and while there was a general feeling of "wow, we accomplished that" afterwards. Looking back, however, I now realize how profound of a hangover it produced in me and some of my teammates, and the hard truth is that it permanently takes a toll (e.g. sluggishness, lost trust, reduced motivation) that you may never get back wherever you are, at least in my experience. The fallout, it seems, truly underscores the 'nuclear option' moniker.