JS is the lowest-common-denominator. Everybody at least kind of knows it, because you don't have any better option if you want to do anything in a browser (Eve

JS is the lowest-common-denominator. Everybody at least kind of knows it, because you don't have any better option if you want to do anything in a browser (Even if you transpile, you end up having to know JS to figure out how to configure your transpilers and build process, and drop down to debug the emitted code). So there's a lot bigger pool of people that "understand" and can do JS than for possibly any other language these days. Maybe Java is bigger still, but I wouldn't be surprised if it's not. That doesn't mean it's good, or that you'd want to use it if you didn't have to and had other options.