For the good parts, I would add the effortless type declarations to overcome “Primitive Obsession”, the immensely useful pattern matching to ensure you cover al

For the good parts, I would add the effortless type declarations to overcome “Primitive Obsession”, the immensely useful pattern matching to ensure you cover all edge cases and what I really found to be the killer feature: Type Providers to enable typed data wrangling in just a few lines.