MoreMicrosoft had originally stated that they planned to release Windows 10 build 9879 to 'slow ring' users possibly this week but that is no longer the case. Microsoft's head of the Windows Insider program, Gabe Aul, has stated that the release will not occur until next week.
The reason for the delay? The company is making a few additional fixes to the build so that it will be more stable when it hits the slower release cycle. The new target for the 9879 release for 'slow ring' users is early next week.