I certainly agree the game has largely evolved away from that old school style. And you make a good point-for sure chryst seemed to have stalled out. But what comes to mind for me-like with many other cyclic things, as folks abandon something, it can find new life after some time or still thrive in isolated pockets.
As teams “forget” the nuances of stopping a traditional run game, we have seen teams start to bring back fullbacks and use H backs as full backs with different angles of attack for their lead blocks. A limited number of triple option teams still find success out there because opponents aren’t prepared for that style of play and teams built with a front 7 best equipped to make plays in space aren’t necessarily equally prepared to handle a traditional running attack.
That’s one of the things I love about football-the continual evolution of how to scheme things up!