I was lucky enough to start my career at a place which appreciated stable working software and the principle of slowing the fuck down. Then I had the unfortunate experience of changing jobs and ending up at a place where speed was king. Developers were worshiped by their ability to blast through projects. I would call this the "Get Shit Done" principle.

What I have found is that you need a balance. "Slow the Fuck Down" gets you working software, but if that takes you twelve months to a year, you lose the sense of progress and accomplishment that having a live product gives you. There has to be a healthy balance between "Slow the Fuck Down" and "Get Shit Done" which usually involves cutting features, prioritizing and temporary fixes. Most projects using MOSCOW is a good place to start with this.