User blog comment:DaNASCAT/Template Types: A Smarter Categorization System/@comment-24155515-20151121200228/@comment-24473195-20151121201002

That would be something like "badges". It is article meta-data and would be better tagged as a flag or a "notice" in my opinion.

Well, in a perfect world we would all categorize / tag our templates in a similar manner. But I don't think you should concern yourself too much over what other wikis do because ultimately people will never have an agreement especially when you take into account non-English wikias.