Mule 3.4 introduces several new features aimed at improving developer productivity and allowing seamless integration both on-premise and in the cloud, including enhanced data mapping, flow debugging, SaaS integration capabilities, and API publishing. It also improves the enterprise runtime for scalability and performance. Anypoint Fabric enables 100% uptime, high transaction volumes, and scalability across thousands of distributed Mule runtimes. Solutions are also provided for integrating SaaS applications with each other and on-premises systems.