One can never get enough of Windows 10 Update History. I found the latest Windows 10 news interesting in that version 1903 and 1909 are nearly identical. There does seem to be some change. The latest versions are interoperating, meaning version 1909 is a master switch for 1903.
“Windows 10, versions 1903 and 1909 share a common core operating system and an identical set of system files. As a result, the new features in Windows 10, version 1909 were included in the recent monthly quality update for Windows 10, version 1903 (released October 8, 2019), but are currently in a dormant state. These new features will remain dormant until they are turned on using an enablement package, which is a small, quick-to-install “master switch” that simply activates the Windows 10, version 1909 features.”