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I'm wondering why JS hasn't evolved into a language that supports multithreading. I understand that we have the event loop model as the model of concurrency execution in the JS ecosystem. I realize this helps execute blocking tasks in a nonblocking way by essentially queuing up these tasks before invoking on the call stack. My question is mainly why don't we want multithreading in javascript? Is the issue mainly due to race conditions happening on the DOM and ruining the rendering on the page? I know that Node is more performant than Nginx (right?) due to the single threaded architecture for all requests, but just missing the why in all this?

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