I think the point Huck, I think, was making was the difference is those blue bloods have been together for a century. The Big 12 was merging blue bloods and having multiple alphas in a room who haven't figured out how to alpha together, was a cage match waiting to happen. In the end, Nebraska was kneecapped and didn't like it.
Even if you consider Pedo and Nebby blue bloods, by the time they entered the Big Ten they were both neutered at entry and brought to knee by the Buckeyes.
On the flip side, the SEC has never expanded with a school brand the likes of the Sooners, let alone Texas, there is bound to be some fireworks if it occurs, even if it doesn't happen for years.
Additionally, this instability isn't like before. This is caused by a seismic shift occurring that is redefining what this sport will be. Texas and Oklahoma are already losing ground in recruiting to the powers that be around them who are well versed in not playing by the rules. Its easier to fightback inside that bubble than outside.