Not enough value for the disruption they bring.
While it is mentioned deep in there, an implosion of the A¢¢ brings about a change of calculus and may get F$U in, but the B1G's preferred targets are UNC and UVA. They aren't leaving unless the A¢¢ implodes and they would prefer the SEC over the B1G anyway and the SEC would certainly jump if the A¢¢ implodes.
And the A¢¢ doesn't implode with just a departure of F$U and Clemson for the Big 12, which they aren't too enamored over joining anyway.
While it is mentioned deep in there, an implosion of the A¢¢ brings about a change of calculus and may get F$U in, but the B1G's preferred targets are UNC and UVA. They aren't leaving unless the A¢¢ implodes and they would prefer the SEC over the B1G anyway and the SEC would certainly jump if the A¢¢ implodes.
And the A¢¢ doesn't implode with just a departure of F$U and Clemson for the Big 12, which they aren't too enamored over joining anyway.