So here we are. It looks like we're getting a patch 3.0.9 today with no PTR and no major advanced warning, if the extended maintenance has anything to say about it. On the good side, maybe this means they're working hard to get 3.1 out, and didn't want to spare the time on a 3.0.9 PTR. Then again, the patch is so small it seems sort of strange to me that they needed a new version number for it and not that other little patch just after 3.0.8 proper. Then again, maybe that is why I am a writer instead of a software engineer.
Anyhow, since we're looking at 8 hours of downtime, you're going to need something to occupy your time. So, as usual, let me recommend some articles from the past week that you have missed the first time around.