I think it's lack of demand, yeah, but I think that's downstream of a real culture clash. Exploratory data analysis is just really not a good fit, culturally, for go. You don't want to be explicit about everything and check every single error case, etc.

But then it's natural to evolve production systems out of exploratory analyses, rather than re-writing everything from scratch, unless there is a very compelling reason to do that. The compelling reason is usually to get more speed, but that's not go's strong suit either.