Tied to the engine is orthogonal to tied to the language. You can compile C, C++, and Rust to WebAssembly. But you still can't compile JS to WebAssembly. Giv

Tied to the engine is orthogonal to tied to the language. You can compile C, C++, and Rust to WebAssembly. But you still can't compile JS to WebAssembly. Given the large amount of code in JS and the number of JS developers, not being able to support a major general purpose language rules out WASM as a cross platform target in my book.