The issue is that on other airlines that charge baggage fees, everyone brings a big roller bag on board. There isn't enough room for everyone's bag, so this lea

The issue is that on other airlines that charge baggage fees, everyone brings a big roller bag on board. There isn't enough room for everyone's bag, so this leads to a massive slowdown as people try to find a spot, flight attendant's trying to convince people to put stuff that fits under seats under the seat, etc.