Sets is dead as Microsoft switches Edge to Chromium, undoing all the work it has originally started with Sets.
Over the weekend, a Microsoft employee on Twitter seemingly confirmed that Windows 10's tabbed apps feature known as Sets was no in the works. Announced back in 2017, Sets was an idea that grouped apps and websites under a tabbed interface, just like your web browser. Clicking on the new tab button would take you to the Edge start page, which would then let you launch other apps or websites.
Full story from the WindowsCentral blog...