In 2017, Microsoft officials provided a preview of two new features coming to Windows 10: Timeline and Sets. Timeline made it into Windows 10 as part of the April 2018 Update, but Sets didn’t. And it’s looking like it never will be included in Windows 10.
My sources say Microsoft dropped plans for Sets, a Windows-management feature, which would have allowed users to group app data, websites and other information in tabs, months ago. Although Microsoft did test Sets last year with some of its Windows Insider testers, the feature generally wasn’t well received or understood. For apps like Office to work well with Sets, the Office engineering team was going to have to do a lot of extra work.
Too bad, because this really looked like a useful feature to easily group related windows into single objects.