#10 needs more emphasis than it receives. Cheaper code doesn't automatically lead to good product decisions.

Instead of focusing on whether you can build it, the scarcer resource becomes whether you should build it. And most teams lack a clear process for addressing this latter question. Requirements are collected in all sorts of places without ever being prioritized in an organized fashion. This is exacerbated by cheaper code. With cheaper code, you can release five times what you used to be able to release in a given period of time, but only if you knew which five products you needed.