[notarealdoctor]

> There are a few times when you need to, but features can in most cases be written in a way that they can live inside production before complete.

That should never, ever, ever be done.

[nhumrich]

Why not? Loads of companies do this. Almost all the big ones I know of do this.

[paul_h]

Really? http://techcrunch.com/2011/05/30/facebook-source-code