While I'm not certain if the world needs more Javascript, I am certain it does not need more Python.
That's overly harsh IMO. Python is not perfect—no language is—but it arguably has the lowest barrier to entry for new programmers, with far fewer "wats" than languages of its kind and era (certainly less than JS). Sure, its reference implementation is not the most performant, but it easily interoperates with C/C++, and alternative implementations like PyPy are also relatively easy to switch to, so it can be performan…
The thing is Python deserves all the hate JS gets and more.
1. The foot guns are real and mean (look up Mutable Default Arguments)
2. The language pushes beginners towards some bad habits (Deep inheritance) and away from good ones (Functional)
3. The performance is very poor (both single and multi threaded)
4. There are no real safe guards, and unexpected type behaviour
5. The packaging story is archaic with no fix in site. (There exist no standard out of the box way to guarantee deterministic builds)
Sure its good at Data, but that is a cultural accident, not by design.