Fast food has a rhythm and everybody in the industry knows it.
Lunch is the business. Dinner is decent. Breakfast is the thing you offer because the building is already open and the lights are already on.
Breakfast is low ticket. People spend less. It requires opening early, which means paying staff during hours that generate the least revenue.
So most chains treat it as a bolt-on. Add a sandwich, add coffee, hope it covers the cost of unlocking the door.
There is a chain in Charlotte that inverted this completely.
Breakfast is not the warm-up. It is the main event, and everything else is built around it.
That choice sounds minor. It changes the entire operation, from what the kitchen can produce to who walks in at seven in the morning.