https://wccftech.com/new-windows-10-2019-18252/

Okay, so apparently Windows 10 October 2018 Update has already become an old news as Microsoft is dropping new Windows 10 2019 Preview Builds. Windows 10 Insider Preview Build 18252 is available to Windows Insiders in the Fast ring and Skip Ahead. This is the first build from the Windows 10 2019 being rolled out to the Fast ring, so things are going to get exciting for this particular ring.

“Going forward, Insiders in the Fast ring and in Skip Ahead will receive the same 19H1 Insider Preview builds at the same time,” Microsoft wrote. “As is normal with builds early in the development cycle, builds may contain bugs that might be painful for some. If this makes you uncomfortable, you may want to consider switching to the Slow ring.”