Great points all around. I think the reason why these stories are so popular is that, from a fan's perspective, coaches rarely challenge orthodoxy head-on. Ins

Great points all around. I think the reason why these stories are so popular is that, from a fan's perspective, coaches rarely challenge orthodoxy head-on. Instead new schemes develop incrementally over time and are composed with other changes to systems and variables such as play calling, clock management, team speed and so on. When you are a coach that has 10-16 times a year to test your theories with your current team configuration, it makes a lot of sense not to rock the boat too hard. So these stories kind of poke at the armchair-coach in all of us that are fans of the game. We've seen the Air Raid work since Leach and Tech, so why not the the NFL? It's fun to think about. That said, Chip Kelly might be on to something in Philly.