Microsoft has announced some changes to the way in which the Windows OS will be distributed to those who need or want to experience its latest features in advance. This includes their distribution via 3 channels: Dev, Beta and the pre-existing Release Preview channels. The Redmond giant asserts that they should keep developers or enthusiasts apprised of what its engineers are up to in 2022.
https://www.notebookcheck.net/Microsoft-splits-the-Windows-Insider-Program-into-three-channels-going-forward.597886.0.html