That's not really the use case for it, the use case for Web Assembly is to take web audio and turn it from being a kind of toy into a platform where an ableton

That's not really the use case for it, the use case for Web Assembly is to take web audio and turn it from being a kind of toy into a platform where an ableton live could be empowered to run in the browser, as well as being able to load native plugins for audio processing and generation. Also say you want to transcode a video file from webm to hls, with web assembly that becomes possible, even with asm.js its really brutally slow to try to do that.