"You’ve either shipped, or you haven’t. You’ve either poured weeks, months or even years of your life into bringing a product or a service into the world, or you haven’t." … "And the next time someone produces an antenna with a weak spot, or a sticky accelerator, you’re more likely to feel their pain, listen to their words and trust their actions than the braying media who have never shipped anything in their lives." Tom on the validity shipping gives you, about which he is very right.
RubyQuiz on A* pathfinding.