Just to mention a real life use case: We are using WebAssembly for the image recognition features in our Visual UI Testing browser extension "Kantu". Before switching to WA, we tested many other approaches, including WebGL (old demo here: https://a9t9.com/demo/templatematching.js/ ).
Whatever we tried before, it was either too slow (pure Javascript), too unreliable (WebGL) or required 3rd party installations (C++). Finally, switching to WebAssembly solved all these problems.
Whatever we tried before, it was either too slow (pure Javascript), too unreliable (WebGL) or required 3rd party installations (C++). Finally, switching to WebAssembly solved all these problems.