This is interesting. But I've always thought including programming language as a feature is very weird. Unless its extensible in that language, but that's not the case here.

End user doesn't care, so long as it fulfills a need. And nobody "needs" a program to be coded in a specific language. It comes across like evangelizing.

It reminds me so much of the 90's arguments about whether C is as fast as Assembly (and whether any Lisp can keep up), so long as you know what you are doing as a coder.

In this case, size is the selling point. Not the language.