Wasm will never take off. It is too hard to get started for it to be meaningful. Maybe for games or things like figma it will work but having to use rust means it will never ever be mainstream.
Already has taken off.
> having to use rust
You don't have to use Rust. There are wasm compilers for dozens of languages. C, C++, D, Java, C#, F#, Python, Go, Lua, PHP, etc.
Also, it's not intended, usually, for you to actually write WASM directly. It's a compilation target. You can import C++ libraries, Rust libraries, and so on, and use them from JavaScript. Or you can write your own C++ code and run it in a browser. You write WASM directly mostly when you write compilers. Have you written compilers? Well let me tell you it's definitely not simpler than WASM.
I'm under the impression you may think WASM is trying to be a replacement for JavaScript. It's not. They play together. In fact, you can think of WASM as a new JavaScript API, like we have WebGL or WebGPU. It's just that. WASM can't do anything by itself. It's just math in a block of memory. But... it's fast math.