Kernel release status
Normally rc7 is the last in the series before the final release, but by now I'm pretty sure that this is going to be one of those releases that come with an rc8. Things did't calm down as much as I would have liked, there are still a few discussions going on, and it's just unlikely that I will feel like it's all good and ready for a final 4.8 next Sunday."
See this summary for the state of currently known regressions in the 4.8 release.
Stable updates: 4.7.4 and 4.4.21 were released on September 15.