> It's like everyone forgot there was such a thing as SFU/SUA
Well, it's not like Microsoft made much of an effort to remind people. It was discontinued as a separate project after about Windows XP. It continued to be part of Windows Server[1], but AFAIK, it was no longer present in the client versions.
[1] at least until 2008 or 2008 R2, I didn't check later versions.
