The help center's list of topics specifically excludes the technical platform/software - it says
If yours is a digital community, please avoid asking questions about a technical feature of your platform.
I take that to mean that discussion of what technical platform to choose in order to get feature X to work is also off topic. However, today a user posted a question asking just that, saying that the fact that the tag forum-software exists made them believe this would be on-topic.
The tag currently has four questions. Two of them aren't actually about specific software; the other two are the one I linked above and another one asking about how to choose software.
Given that the tag hasn't had much use, and that use has been either barely relevant or clearly off-topic, should that tag be removed?