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Re:Node.js is Perfectly Fine And Probably You Don't Need it by jbdeboer on Sunday March 31, 2013 @01:38PM (#5469407)
The author is arguing against learning new languages / concepts by rewriting existing apps.

I'd argue that rewriting existing apps is a great way to learn a new language. By removing the app-specific learning, you can focus on the language. Even better, since you have two implementations of the same app, comparing language concepts is easy.