CockroachDB combines the flexibility of NoSQL databases with the robust transactional guarantees of SQL databases by supporting JSON in version 2.0, enabling rapid development and accommodating semi-structured data without requiring schema changes. This allows developers to easily adjust their data models and quickly iterate on new features, which is particularly beneficial for applications with dynamic requirements or those that manage data without a clear schema. CockroachDB's support for JSONB fields facilitates complex scenarios like varied event metadata or unstructured data storage, ensuring efficient querying through inverted indexes. Unlike many NoSQL databases that lack strong ACID transaction support, CockroachDB offers serializable isolation, making it a reliable choice for businesses that require both scalability and data correctness.