Board Thread:General Discussion/@comment-28868507-20200604204514/@comment-9605025-20200605175049

Both the description of it as a replacement and your description of how it works. Announcements only sends to those who have edited in the last 90 days. I am also not sure what you mean by "doesn't put any notice in the Discussions UI". Users receive a notification in the same list as they do for Discussions.