You're assuming the author wants to use Julia to build complex systems. Much of scientific computing has no need to do so, but is more concerned with discoverin

You're assuming the author wants to use Julia to build complex systems. Much of scientific computing has no need to do so, but is more concerned with discovering new knowledge and testing new ideas. Once the knowledge is gained, products may be built around that knowledge or new inquirires may be launched from it, but scientific computing usually uses programming languages as research tools rather than development tools.