Along with delivering Windows 10 1909 this week, Microsoft has also given patching administrators a bit of good news. In a statement on the Windows Message Center:
Timing of Windows 10 optional update releases (November/December 2019)
There will be no more optional “C” or “D” releases for the balance of this calendar year. Note There will be a December Security Update Tuesday release, as usual.
So, patching admins can rest easy for the rest of the year – except for the normal delivery of December’s Patch Tuesday.