Computerworld - https://www.computerworld.com/article/3252808/microsoft-windows/perfect-end-to-a-perfect-month-yet-another-win10-1709-cumulative-update-kb-4058258.html#tk.rss_all
Microsoft told us three weeks ago that Win10 Fall Creators Update, version 1709, was ready for enterprise deployment. Since then, we’ve seen the early January patch yanked because it tanked AMD machines. Then, after the first patch was reinstated, we got two more cumulative updates. In the past three weeks.
I guess that’s what Microsoft now means by “Current Branch for Business” and/or “Semi-Annual Channel.”