Despite Windows 10 having launched over six years ago, a Windows 9 reference was found still intact in the recent Windows 11 Dev channel build 22567 system file. The file mentions Windows Blue too.
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As a friendly reminder, if you are running an older build of Windows 10 technical preview, it will expire tomorrow. An update to a newer build will be necessary to prevent the OS from not booting.
A Microsoft Support Engineer recently posted a list of build expiration dates. If you are having issues with license expiration notices, get an ISO and update to the latest build.
We know Microsoft is looking at ways of making the new PC Settings tab the primary way to configure your machine and we see evidence of them moving away from Control Panel in the new build of Windows.