Pizza
The pizza demonstrates unparalleled morphological flexibility. From the deep-dish chasms of Chicago to the paper-thin crusts of Rome, from the controversial pineapple additions of Hawaii to the mayonnaise-drizzled variants of Japan, pizza adapts to local tastes with the precision of evolutionary perfection. It can be breakfast, lunch, dinner, or a 3 AM regret. It functions equally well at children's parties and corporate board meetings. This adaptability has enabled its complete infiltration of the global food supply.
Ninja
The historical ninja was indeed remarkably adaptable, capable of disguising themselves as merchants, monks, or travelling performers. They could operate in urban environments or mountainous terrain with equal efficacy. However, this adaptability was ultimately context-dependent. The ninja's skillset, whilst impressive, was optimised for a specific historical period and geographical region. Modern ninjas, where they exist, have been forced to adapt to careers in entertainment and historical preservation rather than espionage.