How Much turnover/devolopment Needed for new Coaching Schemes?

I don't care what defenses are using for formations. Run plays are more common then pass. And for the most part its been growing. You're capable of using google. Have fun with it.
Prove it. Show wehre teams are running over 60% of the time lol. I'm not wasting my time googling something you can't prove. When you can prove what you're saying is accurate then I'll research it.