SIAP but I think is really interesting.
Reads to me like Bowlsby is prepare for the B1G or SEC grabbing a big chunk of the Pac-12 (or later, the ACC) and the Big 12 moving in kind.
When the B1G adds UNC, UVA, USC, UCLA, Oregon, and Washington and the SEC adds Miami, Florida State, Clemson, and Virginia Tech to put both of those leagues at 20... that's when we get NC State, Pitt, Louisville, Arizona, Arizona State, Colorado, Cal, and Stanford and just like that there are three 20-team conferences. Something like that.