[mjlawson]

> Either way you are going to throw it all away once you have settled on what should be the final iteration anyhow.

I think this needs to be highlighted, because while I completely agree, I think it's often implicit, taken for granted, and neglected. Far, far too often I've seen code bases bloat because this never takes place. The sentiment at a lot of places seems to be, if the tests pass, ship it. Arguably, it may even be the right decision.