I will like to know which Steelers defense you all think was the best defense in the 2010's era. For me, it was the 2010 defense. But the 2011, and the 2019, defenses were also great. Unfortunately, the 2019 defense missed the playoffs. The 2011 defense was dominant until the overtime game in the playoffs. But, that 2010 defense was so great. They were 2nd in points and total yards allowed. 1st in rushing yards allowed. 11th in passing yards allowed. 2nd in red zone touchdowns allowed. 6th in takeaways. And got to the Superbowl.