Yup, went through all of those games! The 70s saw a large shift in size and athleticism over the course of the decade. Players at the end of the decade tended to be bigger and faster than their counterparts in the early 70s, to a greater degree than the typical decade. The major shift of the 80s was more towards the passing game. It's surprised me to see the 1987 Auburn team was known as a mediocre running team, but a pretty good passing team. Between their defense and great RBs, my memory fooled me into thinking they were something else. (Though they weren't that great offensively anyway.)
Way more athleticism involved in todays game. Most notable is the LB position. The days of the big burly run stopping Middle LB are long gone. Those dudes gotta run and be able to cover in space now. It feels like the safety position players of the 80's are now playing LB in todays ball.