[$] A viable solution for Python concurrency

Concerns over the performance of programs written in Python are oftenoverstated - for some use cases, at least. But there is no getting aroundthe problem imposed by the infamous global interpreter lock (GIL), whichseverely limits the concurrency of multi-threaded Python code. Variousefforts to remove the GIL have been madeover the years, but none have come anywhere near the point where they wouldbe considered for inclusion into the CPython interpreter. Now, though, SamGross has enteredthe arena with a proof-of-concept implementation that may solve theproblem for real.