seems like new food inventions drive alot of the marketing behind their competetors
trying out new menu items is just 1 thing that pops to mind, and I'm probably completely missing 100 other things that a burger place could inovate on
Maybe they've all done the math and it doesn't make financial sense, I don't know. But there's certainly nothing inherent about the type of food that makes it impossible; I've had great burgers and fries delivered by a few independent restaurants.
I'm waiting on Subway and Togo's to get drive-thru windows. Finally, a more-healthyish drive-through choice.