It does have a ton of numerical/data science/general science libraries to be differentiated and to add value to the differentiable code though.

Yes it does. See genie.jl for a full mvc framework. Also there's mux.jl and http.jl.

It does. I spent several evenings writing little bits of Julia code that do “non numeric” stuff like querying RDF data stores, text processing, etc. I think Julia is a reasonable general purpose language.