A Windows 10 20H2 cumulative update released to Insiders on the ‘Release’ channel leaked that the next feature update will be 21H1. Microsoft has been very quiet about its upcoming servicing plans for Windows 10, including the name of the next update and its features. The feature update is expected to be released in March or April 2021, with users potentially getting a preview earlier. The expected features include DNS over HTTPS, the ‘Architecture’ column in Task Manager, a ‘What’s new?’ section in Tips, and better GPU settings.
Source: https://www.bleepingcomputer.com/news/microsoft/new-windows-10-update-leaks-info-on-upcoming-21h1-feature-update/

