They said the same about boxing 20-30 years ago. It may take a step back but it will not go away. As big as March madness is it does not touch the money football makes. As big as the NBA is... it does not touch the NFL. The superbowl is still the biggest thing on American TV every year. No other sports even come close to those. At least not in the USA.The NFL may eventually find itself in the insurance business if it wants to survive. It seems less likely each year that football will remain sustainable long term.