That's a great overview, will come in useful when debunking this stuff in the future.

One little niggle though, "great concurrency primitives"? I don't know about great. Acceptable for sure, usable, good enough. If you use great then you aren't leaving much room for languages with objectively better concurrency primitives.

If Python has great concurrency primitives, what does Clojure have for example? Super-duper-hyper-great?