Thing is, I don't quite understand what is it for. Or rather, what is it not for.
The whole site is essentially about quantum information and quantum-information-related topics, so I don't see the point in keeping this tag. Looking at the questions tagged with it, I also don't see how this tag is helping categorise them in any way.
What do you think? Can we simply get rid of it? If not, can you provide a good rationale for keeping it?
As a tangential question, I guess this would be problematic for question that are currently only tagged with quantum-information. Is there a way to look for such questions (I'm not well-versed with data.stackexchange, if that's what's needed)?