(Related to What will happen to the Windows-8-Preview tag once Windows 8 goes live?)
I notice windows-10 is synonymous with windows-10-preview. What's the rationale here?
In theory having the two separate tags would allow us to later filter out questions that arose during the technical preview. But that won't be the case if one's a synonym of the other.
On the other hand, if it's not useful to have this distinction, windows-10-preview seems pointless, and we should just use windows-10.
With the benefit of hindsight, I think in future we ought to deprecate creation/use of "product version preview" tags, and instead simply create and use a tag for the upcoming version straight away.