True. When doing just one exercise- finishing all my lifts, then resetting for another exercise. No big deal.
However, In the case of just completing an exercise and not wanting to deal with longer-than-needed rest periods to reset the rig. Or, when I'm doing a circuit between squat, lift, press, pull, swing -repeat. I'm getting pissed having to think about a safe place to set the bar inside the rack, then what hole to throw the j-cup into, reset the bar- then do what weight change i need to... when I could be using my efforts elsewhere. A longer-than-needed rest period doesn't go when I do circuit:interval lifts.