TOC is the first course. Something of a model for future golf courses in all sorts of ways: strategy, blindness, bunkering, randomness. Its design is so strong, so fundamental, that even today, hundreds of years later, it sits right near the top of nearly all the world's best lists.
TOC only has 2 par 3s. Unique among today's major tournament courses, and nearly unique among 18 hole course in general. Given TOC's history and importance to the game, why do nearly all other 18 hole courses have 4 or more par 3s?