The biggest problem with this for Texas and Oklahoma still exists as it has the entire time and that's money.
1. There has not been a school that has switched conferences who have received a full share right from the start, not even Nebraska and Maryland who were actually sought after by the Big 10.
2. Let's say the SEC not only votes to take them, no idea why they would, but whatever, and they give these dudes a full share. The conference and ESPN and FOX would have to, in the midst of the pandemic, tear up a contract that doesn't even start until 2024 and give the conference a minimum of $45 million that only goes to OU and Texas. Bear in mind that this is the same year that one or both of these networks will also, presumably, be paying much more money for a 12 team playoff.
3. Okay so let's assume ESPN and FOX found enough money to make everyone, all 16 SEC teams whole and happy. OU and UT don't get their media rights until July 1, 2025. That means if they left before that day, all of their media money stays with the Big 12, for UT that's 20% of their budget, about 30% for OU.
Here's one more dollar figure for you. UT currently has the highest athletic budget in the country and not by a little either, their budget is $11 million more than the second highest school. OU is 8th, why would they risk that to go play in a tougher conference? Why would the SEC try to feed two more mouths, two gigantic super huge big mouths at that?
I don't really give a crap if they leave, but none of this makes sense.