I wasn’t claiming that they don’t have distinct feature sets; WASM for example can’t currently do any kind of shared memory concurrency, let alone provide a GC with shared memory concurrency. The claim that it’s just a recapitulation of the JVM however is equally innacurate. Nobody would seriously consider running multiple mutually-untrusted JVM programs in the same process, but WASM is offered in that manner in every major browser.

That said, nothing stops a WASM embedder from offering system calls, and you can already use whatever system resources you want via Node as easily as you can use the DOM in a browser.