It seems as if I see a question like this at least once a day.
What's the difference between "X is" and "X will"?
Should I use "X is" or "X was"?
Between "X was" and "X had been," which is grammatical?
As an actual example, the most recent of this type is “What does this achieve?” vs “What will this achieve?”
Each of these questions seems to get an answer, and each answer always points out how verb tenses are used—and that both sentences are grammatical and it's up to the person to use whichever one they wish.
The specific answers are always a bit different, because people pick different words or phrases to ask about, but the general answers are the same.
Do these repeated questions add any value? Or would it be worthwhile to find (or create) a generic post about the differences between verb tenses and grammar and simply mark all such questions (where there is no ambiguity) as a duplicate of it?
If specific questions actually do have an answer beyond that post, then they could be kept open on a case-by-case basis. (Or reopened if the questioners can demonstrate something unique about their own questions.)
But I'm wondering if we should go further than just tagging all of these that way—assuming somebody does even that. Or does the existing system, with so many repeated questions of the same generic type and with the same generic answer, make sense as it is?