Two weeks ago, Microsoft announced that the Windows Insider project was launching a new distribution method, upgrading the original Fast, Slow, and Release Preview Ring to a Dev, Beta, and Release Preview channel similar to Edge. Now Windows Insider has made this improvement.
Windows Insider’s official Twitter account tweets
Hey, guys — Channel’s time has come. These changes are expected to occur in your WindowsInsider settings in the next few hours. Remember, we’ve mapped for you, so you don’t need to make direct changes. Check out the blog for more information on the https://t.co/auc8wvrxRy
Insider members will soon discover that Fast Ring will become Dev Channel, Slow Ring will become beta Channel, and Release Preview Ring will become The Release Channel. If Insider members want to change channels and try new experiences, you can adjust these settings at any time with Settings, Update and Security, and Windows Insider Program.