Okay, at risk of being complete downvote-bait, I'm going to "devils advocate" the opposing view.

I propose that we developers have a tendency to get overly concerned about things like proper practice and code cleanliness. I suggest that, while those things are important, none of it matters if you never ship.

Anyone who's been in this business a while would probably agree that it would be possible to fiddle with a piece of software more or less indefinitely. Duke Nukem Forever, my friends. There comes a time when that nice-to-have feature or that oh so urgent refactoring work just should be set aside and the thing should be called DONE.

I've fought my colleagues about this many times. There's ALWAYS one more tweak, something else that "should" be done for it to be "right". You can ALWAYS find that. At some point, in the real world, good enough just has to be good enough. No real-world, actual, shipping software is perfect. None. At best, it's good enough.