Back in the day, languages called as such where so slow, that there was a feeling that they were used "in lieu" of "real" programming languages. They were there to extend "real" software.
Today? Much the opposite. Computing power is almost always cheaper than brain power, and we use C to extend Python rather than the other way around.
For that matter, I think Go is great for networked infrastructure, but bad for interfacing with other languages and still significantly harder to learn than Python, Julia and R.
That is why I caution on the use of Go in projects which have "scientific" bent to them...