Describe your approach for composing utility types in TypeScript. How can you leverage built-in conditional types along with your own utility types to create powerful abstractions? Provide examples of when this might be beneficial.

Start with built-in utility types like Partial and Omit, then create compound types by chaining these to form new abstractions such as DeepReadonly or Flatten. This strategy helps in building reusable and adaptable types, improving code quality and reducing redundancy.