Microsoft has already finished all major work on Windows 11 "22H2". The RTM build is confirmed to be 22621. So the Redmond is moving forward to its successor, "Copper Release", version 23H2.
The recently release Windows 11 Insider Build 25131 SDK contains references to 23H2. There is the abbreviation SV3 which stands for "Sun Valley 3" and is related to Windows 11 version 23H2. The information has been discovered by Tero Alhonen and shared on Twitter.
The above image is NT Device Driver Interface definitions for Windows versions. SV3 in there stands for Sun Valley 3. More is in the network driver interface header:
At the same time, all Windows 11 versions of have a different code name. For example, the 21H2 version is codenamed Cobalt and Sun Valley. The 22H2 version is Nickel and Sun Valley 2, and the 23H2 version is Copper and Sun Valley 3. You can see these chemical code names in the screenshot above.
Don't be confused with these. Cobalt, Nickel, and Copper are platform codenames, while "Sun Valley"s refers to the system's user interface.
Following the new release cadence, you can expect Microsoft to sign the RTM build of Sun Valley 3 somewhere around May 2023, with the public release in the fall of that year. Currently, the company issues major feature updates once a year.
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