So it appears that Microsoft decided to release KB 4023814, which “secretly” installs the Windows 10 Update Assistant that in turn automatically prompts the end user that the version of Windows 10 they are running is out of date and needs to be upgraded to version 1809.
I must admit, what a clever (and highly unethical) way to get users upgraded…perform a “sneak attack” over the holidays when most people may have their PC on but aren’t necessarily using it. See Woody’s article for further reinforcment…