OTOH, JavaScript is a poster child for what optimization can do on a language level.
If one were to propose Node.js to a developer 10 years ago, it probably would’ve been seen as a fantasy, but today many production apps run in Node and actually work.
I suspect that with WASM and further development of the Java/Typescript ecosystem, we’ll see highly performant web apps running complex loads in the next 5 years (for better or worse).