> So, in my opinion, the true benefit of WASM is the ability to compile into it from other low-level languages, but not the preformance.

That may be true for now, but there are other advantages that have at least something to do with performance.

For one thing, wasm bytecode can be decoded much faster than JavaScript can be parsed. I'm not really aware of situations when parsing speed is an issue, but I imagine there are situations where this is nice.

In general, it will be easier to add new features to wasm compared to JavaScript. Presumably this means features like threads will land in wasm much sooner than in JavaScript, but we'll see.