I'm not sure why people are claiming wasm isn't ready. It's just a compiler target like asm.js was. And that's been in use pretty much from the start when they

I'm not sure why people are claiming wasm isn't ready. It's just a compiler target like asm.js was. And that's been in use pretty much from the start when they got Unreal Engine, Unity, ffmpeg ported to it. Personally I've run Python + Sympy, Xcas/Giac and Maxima in the browser through this amazing tech.