I think this is an important point. What a practitioner can do with a language is influenced as much by the tooling as with the language itself. The implication

I think this is an important point. What a practitioner can do with a language is influenced as much by the tooling as with the language itself. The implication is that languages should be constructed with as much thought given to the external tooling as to the compiler or interpreter. Julia in particular is built to be a practical language so, these points are valuable.