I think they were created recently, and they are rarely (sometimes not) used, compared to the main 'airspace' tag.
My thinking is, for example, if I tag a question with Class-C, Class-C is not the same everywhere. So what is the usefulness when a user decides to filter/search by [class-c-airspace]
?
What are your thoughts?
Should they (apart from SUA?) become synonyms of airspace?