Pizza
Pizza demonstrates extraordinary evolutionary resilience. From its Neapolitan origins, it has spawned countless regional variations: New York's foldable slices, Chicago's casserole-like depths, Detroit's crispy-edged rectangles, and Japan's mayo-corn innovations. Pizza adapts to available ingredients, local palates, and emerging dietary trends with equal facility. Cauliflower crusts, vegan cheeses, and gluten-free bases have extended its reach into previously hostile nutritional territories. The fundamental pizza concept proves infinitely malleable whilst retaining its essential identity.
Thanos
The Mad Titan displays concerning rigidity in his approach to problem-solving. His commitment to the 'half of all life' formula remained unchanged despite mounting evidence of its logical flaws and practical failures. Even when equipped with reality-altering technology capable of creating unlimited resources, Thanos defaulted to his predetermined solution. This intellectual inflexibility, whilst providing narrative consistency, represents a significant adaptive limitation. Thanos cannot evolve; he can only persist in his singular vision.