Yes and no on the GoR being Ironclad. As the cost disparity increases the risk to reward ratio of someone challenging it changes. FSU (and likely Clemson and UNC) WILL eventually challenge it. That time is probably happening sooner than most think. From the things I've seen and heard it likely comes right after this football season. As for the outcome of that we will have to wait and see, but I'm guessing FSU trys to write a check for the full media rights value through the length of the contract. Roughly $30m times years left. That will be fought by the ACC, but I think they eventually prevail and it sets a precedent for how schools will leave going forward. After that, all that is needed is enough time and income disparity (potential money to be made in another conference) for the cost benefit ratio to fall in favor of each school that will leave. The ACC will continue to backfill and won't die, but it will slowly fade into obscurity as everyone leaves for the B1G, SEC, and Big 12.