I'm not sure if this is what rtpg was referring to, but... In this case, the 10x productivity would come from suddenly being able to use C/C++/other code that c

I'm not sure if this is what rtpg was referring to, but... In this case, the 10x productivity would come from suddenly being able to use C/C++/other code that can be compiled to asm.js, which was previously not useful for client-side web apps unless you rewrote it by hand into JavaScript.