If I may jump in, here, for my 2 cents, I've never developed anything commercial with Closure, but I learned it, have played with it and have quite enjoyed it.

If I may jump in, here, for my 2 cents, I've never developed anything commercial with Closure, but I learned it, have played with it and have quite enjoyed it. Having never done any Lisp(-based language) programming before it didn't come... naturally. My guess is that the parent commentator didn't include it for that reason.