The Stack Apps topic help makes it clear that all questions here must pertain to Stack Exchange in some way:
If your question is about …
- the Stack Exchange API
- applications built on the Stack Exchange API
- scripts or browser extensions that work with Stack Exchange sites
… it is welcome here.
Please look around to see if your question has been asked before. It’s also OK to ask and answer your own question. ...
Looking at the current questions, it seems to me that stack-exchange adds no value to those questions.
Compare to related tags like stackapps, stackoverflow, network-profile(not yet needed here but used on Meta Stack Exchange) -- which potentially can be used for Searching/Filtering/Classifying questions in a useful way.
So, should we remove the stack-exchange tag?
If you say no, then please also suggest a useful tag excerpt.