The entire concept of 12 hour days working in front of a computer screen is a joke - the vast majority of people are going to spend 40-50% of that not working,

The entire concept of 12 hour days working in front of a computer screen is a joke - the vast majority of people are going to spend 40-50% of that not working, and the remainder are going to be so unproductive from fatigue that they may as well have only worked 6 hours