Coping from old ER Blog:
The Windows desktop plug-in integrates with the Windows 7 command bar but not the Windows 8/10 ribbon that replaced the command bar. This causes loss of functionality in any such areas. One example is the Get All button that appears in the command bar when there are more than 500 files in a library. In Windows 7, users can click the button to retrieve all files. In Windows 8/10, they cannot and are limited to seeing only the first 500. Files also contributes a right-click Get All context option that can be used, but Libraries (CCM) has no such option. This request is to integrate all command bar functionality into the newer File Explorer ribbon.