At a glanceMicrosoft released Windows 11 Insider Preview Build 22000.51 to the Dev Channel on June 28, 2021. A preview was a testing milestone, not a promise that all announced features were ready.
What became available
Microsoft's first Windows 11 Insider Preview arrived on June 28, 2021 as Build 22000.51 in the Dev Channel. Its announcement described an early version of the operating system and explicitly said that not every feature shown at the earlier unveiling was included.
The release introduced visible changes including a centered Start menu and taskbar, revised notification and quick-settings areas, and a new design for several system surfaces. The useful historical point is that the preview made the design testable while development was still continuing.
Source [1]Why a build number matters
A product name can span many releases. The build number identifies a much more specific version, which is why an old troubleshooting instruction may describe a screen or a problem that no longer applies. The channel also matters: a development preview is made available for testing and feedback, rather than being interchangeable with a broadly released version.
Microsoft's July 8 follow-up, Build 22000.65, added changes and fixes of its own. That short interval illustrates why the first preview should be read as one point in a sequence, not a permanent description of Windows 11.
Source [2]Using the history without following outdated instructions
When an older article says a feature 'will arrive later,' keep that statement attached to its publication date. For a computer in use now, consult Microsoft's current update and support information rather than trying to reproduce a 2021 installation path.
Our Technology section follows newer platform developments. The Meta rebrand explainer offers another example of why the date and the precise subject of a technology announcement matter.
Source [1]