Fast-casual chains like Chipotle Mexican Grill Inc. and Panera Bread are tapping the fast-food playbook as they grapple for growth with old-school stalwarts like McDonald’s Corp. and Burger King.
The latest evidence? The drive-thru window, a mid-20th-century innovation, is back in the limelight as chains competing for “share of stomach” hone in on the convenience factor.
