Update is downloading now, but I would like to ask why the SU3 release post did not work (for me anyway) as an “announcement” in the forum. If it weren’t for the second announcement about the deployment issue on Xbox and PC-MS Store, I probably wouldn’t have known SU3 was out for a few days more.
These are the latest notifications I have from the forum “news & announcements”. Note the glaring omission…
Having found Jayne’s post with the release notes linked below, I see it’s 5 days old. Makes sense that it took time to prepare and was hidden prior to that. Was that the reason why this post in the “news & announcements” category didn’t actually trigger an announcement notification? 
Might be something to look at in future to help on the communication side. I’m not much of a social media user.