In February, Microsoft’s John Wilcox blew away the “Semi-Annual Channel (Targeted)” terminology for blocking Windows 10 version upgrades. At the time, Microsoft declared its old terminology obsolete, replacing it with a statement that those who are actually using the Win10 1803 and 1809 Pro settings to select a branch readiness level would instead be subject to an arbitrary 60-day delay in version upgrades.
Click here for original story, The push to Win10 version 1903 takes in more 1809 machines, yields few complaints
Source: Computer World