I'm not sure I'm understanding. I develop web applications that run well on all major platforms and it's not nearly as hard to do as people make it out to be. A

I'm not sure I'm understanding. I develop web applications that run well on all major platforms and it's not nearly as hard to do as people make it out to be. And the difference between Javascript and Java, Ruby, Go, Rust, etc. is that it runs in an environment that literally everybody already has installed when they buy a computer - the web browser. No mucking around with installing the JVM, or downloading an application to install and keep up to date, etc... you just point your browser to say, Facebook.com or news.ycombinator.com and boom, you are served a nice, cross-platform application that never needs updating. Thus, the popularity of javascript and web technologies.