The interior line positions rarely get the attention that most other positions receive, but they are incredibly important to the stability of an NFL franchise.
The NFL is evolving in terms of how defenses approach getting to the quarterback. Teams are beginning to learn that even if you don’t have a Von Miller type pass rusher on the outside, you can still pressure the quarterback through the inside, which is increasing the importance of interior linemen.
In today’s game, 4-3 defensive schemes are far more popular than 3-4 schemes, as well. This adds more pressure on the interior, hence creating more importance at the guard and center positions.