Pass rushes overall seem more intense today.
The last 2 Super Bowl Champions had DLs that basically overpowered the other teams OL and QB rendering that offense useless.
IMO, the stand tall in the pocket QBs are almost all gone. The NFL QB of today is more mobile. He can and wants to throw the ball, but has the ability to take off with his legs avoiding the sack often ending in a positive play. Converting 3rd downs and extending drives is a back breaker when a D is so close getting the QB.