[cmicali]

One argument for one language everywhere is the benefits you get from an "isomorphic" app (http://nerds.airbnb.com/isomorphic-javascript-future-web-app...)

Sharing code between client and server lets reduce duplication and use the same templating/rendering on both sides. Fits very well with complex single-page apps.

That said, I'm not sure there are that many apps that really need this vs. the tradeoffs you have to make going all-in on JS and the complexity this can bring.

[nwienert]

What complexity does it bring?

I'm writing apps from the ground up using React and I've found the isomorphic bits take <10 lines of code as long as you design for it from the start.

[codygman]

Thanks for putting isomorphic in quotes.

[magicalist]

I don't know why it bothers me so much, but it really does. What happened to just saying that the same code is run on the client and server? Avoids the jargon, doesn't make math nerds mad, isn't that much longer, and says exactly what you mean.

[JetSpiegel]

Correct use of the scare quotes there.