A physical line has historically been a de facto surge price. You have to pay the cost of the meal plus your own opportunity cost of waiting in line. The long l

A physical line has historically been a de facto surge price. You have to pay the cost of the meal plus your own opportunity cost of waiting in line. The long line is also a signal of how long your food will really take. Mobile options almost completely eliminated that, so you have way more orders at a time than you otherwise would (or the restaurant needs a digital queue of some sort)