Oddly enough, I see quite a few startups where this is prevalent and even celebrated. I remember talking to a YC company where top-down from the CEO, I was told

Oddly enough, I see quite a few startups where this is prevalent and even celebrated. I remember talking to a YC company where top-down from the CEO, I was told that everyone worked 80+ hours a week and people were proud of the fact that occasionally they slept under their table. Looking closer at the operation (I spent a good few hours at their work place), It seemed apparent that most people were around late in the nights not because they were doing focused work for 18 hours but because they were inefficient enough that a significant bit of time was being spent doing other meta-non work related stuff. I suspect one of the reasons for this was that their "open office" environment was so incredibly distracting that there was so much context switching going on.