The next major shift is death. How long do you think?
I give it 5-6 years.
This currently has my vote.
LSU already can't compete in the portal with schools with richer NIL-sources. If that continues, and I'm not sure at the moment why it wouldn't, LSU is an example of a "have" that's about to go to a "have not." Sure, they'd be brought into whatever new superconference gives the finger to the NCAA, but then what? They aren't going to thrive there.
Just a matter of how long it takes the fans to catch on to what's happening. There are many, many,
many lifelong, hardcore LSU fans who believe that things are going to turn around eventually because they always have, and they may live out the rest of their lives and die without realizing an entire paradigm-shift occurred. For others like me, it hasn't even really happened yet, and my interest is already waning.
It could keep going--artificially, in a sense--for as long as the majority of a fanbase doesn't catch on. Using us as an example again, LSU could technically become useless, but we still benefit teams like Texas and Alabama to play for as long as we have rabid fans. The economics could keep viability longer than seems warranted, even as the actual product on the field may be shot to hell.