The accepted answer uses an example from StackOverflow, where it was brought up that the "Java" tag is much more popular than the "Java-ee-6" tag.
I personally see this reasoning as way too specific to StackOverflow. Differences in versions of programming languages are generally related to available features. Code written for C# 5 will most likely work perfectly fine in a C# 7 compiler.
Games such as Warhammer 40k are vastly different. The entire game system is overhauled from edition to edition, and answers will be completely incompatible, depending on the version in question. For instance, this question would have completely different answers, depending if it is played in eighth edition or seventh edition.
One example of this being used is RPG.se, where specific tags are created for specific versions of games, such as Dungeons and Dragons, because a question asked by a player intending to play 5th Edition may have a radically different answer than someone playing 3.5E.
As such, I am asking if the view on game version tags has changed over the past few years? Does the community consider version-specific tags to be valuable or add clutter?
Edit: In regards to confusion when using multiple tags. I suggest the following info for warhammer-40k:
In the grim darkness of the far future, there is only war. Warhammer 40,000 is a detailed futuristic table-top battle simulation. Use this tag for questions about the tabletop game. Consider including version-specific tags, such as warhammer-40k-8e, if your question is about a specific version of the game.
And likewise for warhammer-40k-8e:
The eighth edition of warhammer-40k. Use this tag when asking questions specific to the eighth edition of the game. If your question is generic enough to be applicable to multiple editions, do not include this tag.