One does not have to believe that "all of the real computation happens on the server" to not want to use Javascript if one doesn't have to. Where are these myt

One does not have to believe that "all of the real computation happens on the server" to not want to use Javascript if one doesn't have to. Where are these mythical Node.js applications that share so much code with the client though? What functionality is shared and how much time did it save anyone? Personally, I wouldn't trust one browser-land function or library in my server application without digging through every line of code to make sure it's not going to do some browser-specific hackery. Then what have I saved? I'd rather go get a separate module that was built specifically for Node.js. Then there's the time I'd save sharing my own code between Node.js and browser - which would be next to nothing because any time I save would be spent having to think about platform differences anyway.