I spend on average, one hour at the gym. Leg days will be a bit longer. I take very little rest between sets. If im training with a partner my rest period is only as long as it take them to do their set or if im by myself ill gulp some water, contract the muscles a bit and get back to it.
I do not think that is bro science, workouts are meant to be quick and explosive and then we should start the healing process. Workouts can be extended though without going catabolic by adding a intra workout carb/bcaa shake. I also believe immediate post workout nutrition isnt as crucial if youve had this shake.
No I do not think steroids counteract this allowing you to train for hours while remaining anabolic. What causes you to stay anabolic is food consumption ie: protein (amino acids, specifically Leucine). The body is either anabolic, or catabolic, never in the middle, it one or the other. If you arent getting enough protein (with enough Leucine) on a consistent basis, steroids wont compensate for that, never.