The post was deleted shortly following it was posted.
It seems that the situation slowly twisted
A Microsoft employee seems to have accidentally announced that Windows 11’s “Notepad” app would be very close to adding tabs. The employee, a Microsoft product manager, uploaded a photo of Notepad with tabs, while excitedly announcing that the app was now tabbed. This tweet was deleted a few minutes later, which means that surely the message was a real mistake.
In fact, the message had a quite illustrative internal message from Microsoft: “Confidential, do not count these improvements or take pictures” explained this warning, which appears in all applications in early Microsoft testing.
If Microsoft doesn’t shake things up, it will become the first Microsoft app to include tabs following they added them to File Explorer earlier this year. This function carried four years in the fridge since it was announced in 2018 under the name “Sets”. It seems that this initial approach was suspended and that later another system similar to what we now know as tabs began to be developed.
