Burger King is tweaking its Whopper — and the changes don't just freshen a decades-old recipe; they also reposition its flagship product as part of the fast-food industry's broader premiumization push amid years of value wars . The chain is betting that highly visible upgrades — including what a press release described as "a more premium, better tasting bun," and packaging designed to prevent the dreaded squish — can compete against its fellow quick-service restaurants as diners increasingly