Jeff Bridges and Kurt Russell are the New Robert Duvall and Tommy Lee Jones
It was bound to happen. Both Duvall and Jones are aging on into their eighties and can't quite deliver the "grizzled middle-aged white man" support they did for decades.
Meanwhile, we've watched Bridges and Russell grow up from child stardom(Russell) and youth roles through sexy middle-age and now they are in their late sixties....
...just in time to take over for Duvall and Jones supporting younger players (like the casts of Guardians of the Galaxy, Fast and the Furious and Kingsman) on the basis of their age and their screen history.
They'll be good for at least ten more years of movie work!