Here's hoping that "Windows 12" will be just a Window manager + Desktop running on Linux, with all existing bugs meticulously replicated to maintain backwards compatibility with Windows 95/7/8/10/11.
As another commenter pointed out regarding the integration of this new "sudo" and UAC prompts, it will probably be done in a new, separate, different tool, because this new, freshly released "sudo" will now have to remain bug-for-bug compatible for the next four decades.
I always wondered why it wasn't called WslEx.