Not directed specifically at you, Jax. Just piggy-backing off of this post.
Clemson didn't come along as they current exist until what... 6 years ago? Dabo really turned that program around. But staying power is doing it in 2 different decades, which remains to be seen for them. Clemson has a pretty recent history (35 years or so) of being very mediocre.
As for the rest? UM, Texas, USC, Da U? They have only themselves to blame for their downturns. Questionable coaching hires repeatedly after letting/seeing successful staffs go has made these programs a shell of what they were just a short 10 years ago. scUM dumped a NC winning (split title) coach for a WV redneck and a bunch of 160lb slot receivers. Then hired a professional clapper who somehow won a BCS bowl against a widely inferior team in a season that their biggest obstacle was a 6 win tOSU. Meanwhile despite the uptick, they couldn't keep recruiting momentum nor develop their players. All of that just in time to hire their "savior" who has been anything but. Generally, saviors can't be egomaniacs, but Harvard of the West apparently didn't know that? Texas felt Mack Brown lost his grip on his own team but, as it turns out, he's still a pretty good coach pulling off successful seasons at a basketball school. SC? Pete Carroll aside, was a program lucky to not get some serious shit thrown their way. But they've been irrelevant since that night they won in The 'Shoe. It's L.A. for Christ sake, you're telling me you can't get recruits to beautiful weather, a buffet of women and top notch facilities?
Then there's The U. Honestly I just wanted to toss this one in for fun. They haven't been shit since Tressel put the nail in the coffin, but they're a fine example much like SC. They have everything going for them location and facilities wise, but can't seem to make it work beyond a 9 win season here and there.
Who else can we really claim as blue blood? Jaw-jaw? Fuck off. LSU? Congrats, you went from Les Miles dumbass to a muppet that needed generational talents at QB and WR to pull it off in a year that nobody besides the Buckeyes played defense. Between 2007-2019 was what? Mediocrity and getting blown out in a rematch against Bama. Shit, LSU is as lucky as anyone that 2020 outdid 2007 as the weirdest year in CFB that I can remember. How soon do we forget about Les and the "Well two losses is one tie in the old system".
Bama and tOSU didn't just "pull ahead" - the other big names in college football simply started falling behind. Way, way, waaaaaay behind. For as consistent as the Bucks have been the last 2 decades, Bama has more to show for it than us even. It's one of the more impressive runs in football history. But all runs end.