Jack in the Box built a 75-year business by refusing to choose between burgers, tacos and breakfast. Now the San Diego chain has to prove that its appetite for variety can survive a leaner, more disciplined era.
The Mojave taco stand that grew into America's number-two Mexican drive-thru now serves fries next to burritos, runs a loyalty app with four heat-rated tiers, and just changed hands for the second time in three years.