Microsoft doesn’t like to use terms like Release Candidate (RC) or Release to Manufacturing (RTM) anymore. But it appears that the RTM build of Windows 10 version 1709—aka the Fall Creators Update—has just shipped to Windows Insiders on the Fast Ring.

I write “appears” there because Microsoft isn’t saying: There’s no blog post, no word from Microsoft that I can find. But if you accept the fact that the original build 16299 release of Windows 10 is, in fact, the Release Candidate, then last night’s minor update to build 16299.15 is almost certainly RTM.

You know. Probably. Maybe.

Corroborating evidence: Microsoft pushed the original build 16299 release to the Slow ring too.

More evidence: The desktop watermark is gone after making a return in the previous two Insider builds to the Fast ring.

Another possible scenario: That we will see further point releases to 16299 in the build-up to the public release on October 17, which is now exactly two weeks away. As a reminder, the Creators Update had several such updates between “RTM” and “GA” (general availability).

Which is, of course, another term Microsoft hates to use now.

But no matter. Windows 10 version 1709—the Fall Creators Update—is basically done.

I think.