@Ope3 outside of current/future ACC members (including ND), there are no schools left that could still be added that they wouldn't have already added.
It's stable.
No current ACC members will be allowed to leave. That's controlled by ESPN.
Why would they, for example with Florida State, allow a property which they already own at a much cheaper price (that FSU agreed to and signed a contract for!) to break their deal and go someplace like the SEC where they'll have the exact same property at a much more expensive rate?
They won't allow it. TV pays for and therefore owns/controls everything.
FSU isn't a good enough school to join the Big Ten. Not on the table. AAU selected
South Florida over FSU ...