Actual subforums or categoriees (as this software calls them) for that would be really overload IMHO.
If there should be one topic per theme or extension. But that also will be inconcenient if all sorts of questions and issues are mixed within one…
If all topics were tagged properly it all would be easier to find of course… But no one really thinks of this and doing this afterwards is too much work.
Maybe its just easier to just ask newly.