Lol how?
In the scenario where FSU, Clemson, and UNC find a way out of the GOR to go elsewhere, that means a fourth likely comes along to prevent odd numbers - we'll say it's NC State over Duke. Perhaps they go to 6 and take Duke and Miami too. If those four/six are out, ND is right behind them out the door to full independence. Heck, the Big East should let them park their Olympic sports just for the hell of it.
Now you have an ACC of:
BC
Syracuse
Pitt
Wake
GT
Louisville
VT
UVA
SMU
Cal
Stanford
That group ain't surviving. It'd only be a matter of time before the two Virginias and GT find new homes, the three western teams realize this is a disaster. At that point, the Big East would be wise to propose an all-sports merger.
What I proposed is not a highly unlikely scenario. The ACC right now is a complete house of cards.