1.
What creates you can kill you. Pizza Hut bet on dine-in, suburbs, franchising, and cheap cheese — when those dynamics reversed, their entire model collapsed.
2.
Specialists beat generalists when markets shift. Domino's focused only on delivery and digital; Pizza Hut tried to master dine-in, delivery, and gimmicks — and sucked at all three.
3.
Being a 'side hustle' is terminal. First Pepsi, then Yum Brands never gave Pizza Hut the focus needed to maintain quality and adapt to changing consumer behavior.