While I disagree with the comment you're responding to, and agree with yours, there are some interesting problems doing resource heavy operations in ML/NLP in an environment like Node that's inherently single threaded.

I'm actually adding multi-threading to classifier training in node-natural as we speak [0] so it's something I'm recently familiar with. Multi-threading in JS isn't new or particularly exciting (even less so is multithreading in ML/NLP applications) but the marriage of the two has led to a few interesting problems in JS's asynchronous/event based view of the world!

[0]: https://github.com/NaturalNode/natural/issues/124

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Edited for clarity