To build a product that millions of people use, you must prioritize the core product at the expense of the "first mile".
Without a good first mile, customers cannot know: 1. Why they're there 2. What they can accomplish 3. What to do next
How do you best design a first mile experience? 1. Optimize for first 15 seconds of laziness, vanity & selfishness 2. Do>Show>Explain 3. Accommodate ego analytics 4. Provide immediate novelty or utility