Now there's a new tag, qgis-3.
Should qgis-3 be merged with one of the other qgis tags? If so, which one?
Pros: This would be consistent with how we've handled version tags in the past. QGIS already has a lot of tags. qgis-3 currently has only two questions, so it would be easy to get rid of this tag.
Or should we keep qgis-3 as a standalone tag, to refer to the entire 3.x series?
Pros: The 3.x series is a major change from the 2.x series. The logo changed color from yellow to green, many new features were added, and many old features work differently.