Windows 10's "Sets" tabbed apps feature will no longer be implemented
Sets, which would have allowed Windows 10 users to group together different applications (such as Office, the Microsoft Store, and Edge) into one window separated by tabs, is no longer being developed and will no longer appear in upcoming Windows 10 updates.
The feature was originally scheduled to be implemented in the April 2018 Windows 10 update, but was delayed. Following multiple changes in direction for the development of multiple apps that Sets targeted to support, such as Microsoft Edge's shift from a proprietary engine to the open source Chromium, the decision was made to cease development.
Though Sets will no longer be implemented, tab-based navigation will still be coming to the PowerShell console. This feature was originally announced alongside Sets, utilizing the same underlying technology. Now that Sets is no more, however, tabs in the console will have to be implemented without the use of Sets as a foundation.