SharePoint 2013 Introduces Minimal Download Strategy and Distributed Cache Service to Improve Page Load; and Shredded Storage to Improve Storage required for saving files. (Source: Learning SharePoint)
Most people use AppFabric (Features) which Microsoft Microsoft AppFabric 1.1 for Windows Server Ends Support that support for AppFabric 1.1 will no longer be supported. Microsoft recommends and encourages all to migrate from AppFabric to Azure Redis Cache. So expect this to change in SharePoint 2016.