4 years ago in 2020, I would have said that Neb, PSU, Mich, Georgia, USC, Tenn, Texas were all blue bloods that were in danger of losing their blue blood status if they didn't win something soon.
Ohio St, Bama, Oklahoma, Notre Dame were safe.
Meanwhile Clemson, LSU, Florida St seemed to be emerging as potential new blue bloods if they kept winning.
Since then Mich, Georgia, have restablished themselves as blue bloods while Neb continued to slide. Texas, PSU, USC and Tenn have done well enough to stay in the conversation. LSU, Clemson, Flor St still have potential as new blue bloods.