An early version of the feature first appeared in Redstone 4, which was a beta testing version of the Windows 10 April 2018 Update, but it was removed from the final release.
However, with the latest Windows 10 test build, 17704, which has just been released, the Sets feature has been removed, which means it's unlikely to appear in Windows 10 when the next major update is launched.
Microsoft releases early versions of Redstone 5 to users to test the new features and send feedback. It appears that due to this feedback, Microsoft has decided to pull the Sets feature for now.
As Microsoft’s Dona Sarkar explains in a blog post announcing the 17704 preview build, “we’re taking Sets offline to continue making it great. Based on your feedback, some of the things we’re focusing on include improvements to the visual design and continuing to better integrate Office and Microsoft Edge into Sets to enhance workflow”.
Sarkar promises that Sets will return in a future build, and hopefully this extra time makes the feature even better to use.
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Matt is TechRadar's Managing Editor for Core Tech, looking after computing and mobile technology. Having written for a number of publications such as PC Plus, PC Format, T3 and Linux Format, there's no aspect of technology that Matt isn't passionate about, especially computing and PC gaming. Ever since he got an Amiga A500+ for Christmas in 1991, he's loved using (and playing on) computers, and will talk endlessly about how The Secret of Monkey Island is the best game ever made.