I fly about once a month for work, mostly short domestic routes, and I keep noticing how much the boarding process stresses everyone out. Why do airlines still insist on boarding back-to-front by zone when we know that window-middle-aisle or even random boarding can be faster? I've read studies showing group boarding can cut total time by nearly half, yet carriers seem stuck in old habits. Could there be a real operational reason I'm missing, or is it just inertia from legacy systems?