I'm not an expert on this, but one example is that immutability lets you operate safely on things in parallel. But JS VMs are not aware of objects that are immu

I'm not an expert on this, but one example is that immutability lets you operate safely on things in parallel. But JS VMs are not aware of objects that are immutable in Clojure's semantics, and in any case, do not operate on objects in parallel anyhow.