Around this time, a folder called 3D Objects was added to the OS, because Microsoft truly believed that consumers would be interested in this stuff. And now, that folder is going away, signaling an end to the giant mixed reality push. The change showed up in yesterday's Windows 10 Insider Preview build (via Windows Latest), which was build 21322.
Sadly, Microsoft's mixed reality plans never took off, at least from a consumer perspective.
The one empty folder that you cannot remove is finally going away.