The seats are assigned. People have been standing in line for 15 minutes now. Why on earth would anyone want to stand there, when they could just sit and wait until the line clears?
I understand wanting to get off a plane ASAP, but boarding? You just end up sitting on the plane, waiting for everyone else to get on.
Also now i go from a medium checked bag with plenty of space to a large bag half full of her stuff and weighing it at home to make sure its under 30kg or whatever the limit is.