Geography (and economics and arithmetic) lesson: In case you didn't know it, Louisville, KY is on the Atlantic Coast, and Oklahoma is in the East.

(Image from Pixabay) So. The Pac-12 athletic conference is going to shrink to 10 members. Texas and Oklahoma, which aren't exactly in the east, will be joining the Southeast conference. The Big 10 is already up to 14 members, and will apparently be adding 2 more, making it the Big 16, maybe. The Big 12 currently has 13 members, and will shrink to 8. The Atlantic Coast Conference includes Notre Dame (sort of) and Louisville, which are both about 600 miles away from the nearest ocean. Have you got all that? It doesn't really matter very much if you do, because there will be more changes, barring the Second Coming. By the way, there are more sports than football, but that's the big one.

Why is all this happening? Money, money, money. Major college sports is an industry, more than a sport. It reflects our values pretty well.

See here for Wikipedia's reporting on this phenomenon, without my editorializing:

https://en.wikipedia.org/wiki/Power_Five_conferences