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.
A lot of people shit on Spirit, but I travel with just a small backpack and I upgrade to their “big seat” in row 1. Especially when coming home because they only have 1 gate at MSP and its right at the front of their concourse. When I’m sitting in 1A (I think), I’m outside the airport about 5 minutes after the plane is at the gate.