Win10 stable versions such as v1903 and v1909 will be abandoned, and Microsoft will launch updates

Microsoft has warned users that the end of service for windows 10 1909 is coming, suggesting that everyone should update to the updated version before May 11.

This means that the next patch cycle will bring the last security update to windows 10 and 1909. After that, this version will be eliminated. The computer running it will not get any new patches, and vulnerabilities or glitches in the operating system will not be fixed.
Microsoft said that along with the four basic versions of windows 10 version 1909 (including home, pro, Pro for workstations and pro Education), it will also retire all other special versions of windows 10 version 1909.
This update includes reliability improvements to the windows update service components (versions 1507, 1511, 1607, 1703, 1709, 1803, 1809, 1903, 1909, 2004 and 20h2) in Windows 10, as well as some other updates.
In addition, after applying the patch on Windows 10 v1909 or 20h2, the system will install a new tool named "Microsoft Update health tools".