What you include as a first-class element in your languages, versus what is packed away in a library, will affect what developers do with your language.
For instance, Numpy provides array-language [1] capabilities to Python, but because it isn't a first-class element in the language Python is not thought of as an array language, and using it as one would be a bit clunky.
For instance, Numpy provides array-language [1] capabilities to Python, but because it isn't a first-class element in the language Python is not thought of as an array language, and using it as one would be a bit clunky.
[1] https://en.wikipedia.org/wiki/Array_programming