Today Microsoft released Windows 10 Insider Preview Build 18237 (19H1) to the Insiders on the Skip Ahead ring. This build adds a translucent Acrylic texture to the sign-in lock screen as well as fixes various issues and bugs. Also announced is the renaming of the Microsoft Apps Android application to "Your Phone Companion".
Today's release of Windows 10 Preview Build 18219 is only available to Insiders in the Skip Ahead Ring whose availability was officially closed as of yesterday. This means that unless you had previously selected the Skip Ahead build, you will not be able to get builds form the 19H1 branch until they reopen it.
Microsoft announced today that they have reopened the Skip Ahead Ring for Windows 10 Insiders. If you have not had the opportunity to try skip ahead Windows 10 builds or want to join it again, you better do so quickly before all the spots are taken.
With the release of Windows Insider Preview Build 17713, Microsoft has announced that they have forked the Redstone 5 build (RS5) to a new branch called "RS5_RELEASE". They have also stated that they have moved all Insiders who were in the Skip Ahead build back to the Fast ring.
Today Microsoft released Windows 10 Insider Preview Build 17634 for PC to insiders on the Redstone 5 Skip Ahead ring. Now that Redstone 4 is in RTM to be released as Spring Creators Update, we will most likely only see new builds for Redstone 5 for the next few weeks.