It may finally end up being a situation that forces that decision. Realignment PLUS the playoff changes that almost have to follow will dictate it all. I mean, if what are now the SEC and B10 end up creating two 20 team mega-conferences, the ACC becomes essentially more like what is now a G5. Clemson by itself can't float a conference to that level. No evidence yet that a UNC or Miami, or heck even an FSU, can or will offer much support as far as being teams that could make it to the final 12 and be competitive. Or whatever the # of playoff teams will be.
The money difference will only make the divide grow stronger a faster. Not hard to imagine teams getting north of $80 mil a year thanks to extra playoff cash in addition to better mega conference deals. All while the ACC moves from $35 to, what, $40 mil? Woohoo! Imagine being a big national NIL participant too. Some brand that will spend on multiple players across the country. You can have your pick of players from mega-conferences and get all your marketing band without having to worry about the "little" conferences. Say a Doritos or Nokia or Chick-fil-A that already put a lot of money into sponsorships.