Web workers already exist and there's wasm threading libraries that target just web workers. https://github.com/w3reality/wasm-mt https://github.com/w3reality/

Web workers already exist and there's wasm threading libraries that target just web workers. https://github.com/w3reality/wasm-mt https://github.com/w3reality/wasm-mt It's just that with sharedarraybuffers and atomics we unlock better performance and can match APIs of native OSes. But that's okay, we can still have a fallback for Safari (specially if we can architect the app so the threads only communicate by passing messages) and it shouldn't be a big deal.