The SEC must keep up.
Keep up with what? The SEC was the originator of the big conference plan in the modern era, being the first to expand to 12 teams. Things have worked brilliantly ever since.
“Keeping up” is an awful reason to expand. Only two conferences have gone past 12 members recently. The WAC went to 16 in the ’90s and imploded shortly thereafter. The MAC expanded to 13 by adding Temple when it was kicked from the Big East, but that’s presented scheduling issues. The existing test cases for football conferences larger than 12 members are not promising.