Like I said, this didn't affect me, but I had second hand anger. And I can't even think what the point was of it. I have to imagine that they have just gotten used to there not being enough space and they didn't bother checking if it was the case on this flight.
Comical.
Or are you claiming that doing so moves the center of mass in a way that makes some practical difference?
Just like how they "monitor" weight by assuming average weights for simple categories and just counting passengers, many airlines let the computer decide when to cut it off based solely on the number of people boarded, times what they surveyed the average number of carryons per person to be, with zero feedback of whether the bins are actually filling up. Some airlines (American) go further and cut it off earlier than usual if the computer thinks D0 might be threatened.