Spring Data Couchbase 2.0 is a comprehensive rewrite of its predecessor, enhancing the integration with Couchbase Java 2.2 SDK and supporting the N1QL query language introduced in Couchbase Server 4.0. This upgrade introduces features such as improved configuration elements that reflect Couchbase's structure, the ability to back custom repository methods with N1QL instead of views for more flexibility, and the inclusion of geospatial and multidimensional querying capabilities. It enhances query consistency options, allowing users to choose between multiple consistency models, and addresses compatibility issues with Couchbase Mobile by enabling type information field customization. Additionally, it supports Pageable and Sort parameters in N1QL queries, offers improved documentation, and includes numerous bug fixes and performance enhancements. The release aims to provide a more robust and flexible framework for developers working with Couchbase and Spring Data, with plans for further integration in future updates.