The Dev channel of Windows 11 insider has obtained a stack update just now today on 01/02/2022. This release will “deliver improvements to how updates work before a PC receives a monthly cumulative or feature update.” Stack Package Version 8184.108.40.206 is the new version that will ensure that your machine may have the best opportunity of comfortably installing updates, without the risk of potential problems and disruptions.
The update is installed quickly and no reboot was required.
New Windows 11 Update Stack Package Version 8220.127.116.11
As there, only the clarification remains: “We can provide improvements to the update function before the PC receives a monthly or feature update. The update stack package will help ensure your PC has the highest likelihood of installing new updates successfully and with the best and least disruptive method.”
The release was downloaded and installed so quickly that anyhow I could manage to take a screenshot of the stack update. This might be a matter of surprise when the coming Insider Build will bring us if Microsoft is providing two such updates so quickly in a row.