The primary reason people scramble to board a plane first is overhead bin space. As airlines have increased checked-bag fees, more passengers are carrying on larger rollers; because bin space is finite, the last people to board often have to "gate-check" their bags, which means waiting at the carousel upon arrival. Early boarding also allows travelers to "settle in" without being rushed, giving them time to organize their electronics, grab their headphones, and sanitize their seat area before others arrive. For those in the back of the plane, boarding early avoids the "bottleneck" of people struggling with bags in the aisle. Additionally, many people prefer to claim their "territory" early—securing their armrest and foot space—before a seatmate arrives. While boarding early means spending more time in a cramped seat, for many, the peace of mind of knowing their luggage is directly above them is worth the extra 20 minutes spent sitting on the tarmac.