Five years ago, in 2014 in Brazil, a paraplegic did the initial kick in exoskeleton.
The exoskeleton was developed by brazilian scientist Miguel Nicolelis (https://en.wikipedia.org/wiki/Miguel_Nicolelis), who also works at Duke university.
Pypy is python written in Python.
Plus Python do handle threads well, see Jython, Pypy and and any other variations that compile to a JIT.
Python is way past this both issues.