This is all about football and I'm sorry, BC just doesn't have the cachet. When the game of musical chairs ends, BC is going to be amongst the many schools left without a seat.
Except that doesn't explain how Maryland and Rutgers got into the Big Ten then. But with the two power conferences already at 16 teams each I just wonder how you can keep expanding and then have a regular season that makes sense. With ND, Clemson, FSU, Miami, Oregon, Stanford, OK St. etc I would think there is room for a 3rd conference rather than stacking more teams into just two. But we'll see. You could see a merger of ND and the best of the rest from ACC, Pac 12, Big 12. Not sure if ND still thinks being an independent is viable.
For BC or any similar program it will come down to whether or not the SEC and Big Ten are content with dominating college football or if they want to kill off those programs entirely and not even be associated with them. To put it in hockey terms, is there room for BC to operate in an Atlantic Hockey type league compared to the SEC being the NCHC. Loose comparison but that is what I don't have a grasp on. What if Stanford, Washington, ND and Oregon went to Big Ten and Clemson, FSU, Miami and North Carolina went to SEC? You're gonna somehow have a 20 team football league playing a regular season schedule?