The Couchbase Mobile stack has been updated to version 1.4, which includes the first release of Sync Gateway Accelerator into general availability. This new feature is described in a short video that explains its technical details and how it can be used. The latest update also includes other new features and improvements, making it an exciting time for developers who use Couchbase Mobile. With the release of version 1.4, users are encouraged to try out the new features and provide feedback through various channels such as Twitter, forums, and Stack Overflow.