A major overhaul every year and a security update on Patch every month. In fact, Microsoft arranges small to big updates every now and then. Have you had the same issue of not being able to complete a Windows 10 update to the latest 21H1, or the older 20H2, 2004, 1909, 1809?
The case could be related to a discontinuous updating process, aborted update by some error codes or update just failed midway. Windows 10 won't update after endless waiting.
