It will be interesting. These big RB contracts are gonna go the way of the dinosaur.
AK, much like Christian McCaffery, is a different animal. Their receiving abilities are rare, they essentially roll up 2-3 players (think roster spots) into one elite package. That is very valuable, but not worth tying up a disproportionate amount of cap % to though either. Not when you can continually find mid round rooks that can capably tote the ball--esp behind good offensive line/schemes.