This maybe an unpopular opinion, but I feel WebAssembly in the browser is the wrong direction - this vision to turn the browser into an OS so that we are then forced to rent every software through the "cloud" will screw all of us eventually. It is going to make the web less open. With HTML and Javascript (or even VBscript in the old IE), you could always look at the source. Good luck doing the same with WebAssembly. Soon websites will start bundling WebAssembly malwares and browsers will then also bundle an anti-virus (probably coded with WebAssembly) to counter it. Ofcourse, the anti-virus will need a "cloud service" so everything you do on the browser will be collected and sent "anonymously" ... good bye privacy.