No.
This article is silly, on a couple of main counts:
1) saying "Javascript is still useful for non-ML stuff you might want to do" is not an argument for using Javascript with ML.
2) There's a bit of a self-fulfilling prophecy here. "Why is Python massive?" asks Purves. "It's because there's a massive Python library. It will be hard to dislodge the ecosystem." - wrong. A self-fulfilling prophecy would be if people were using Python because it's known to be massive, which is undoubtedly true, but not what's claimed here.
3) Why do you want to push Javascript here? Why not any other of a number of languages for whom the exact same vague arguments apply?