If they get that big, they're basically acknowledging that they no longer have a single conference, but rather two separate conferences who agree to play a single championship game amongst their winners. With 10 teams in each "division", you're either not even going to play every team in your half of the conference, you're going to have NO cross-divisional play, or you're going to give up on non-conference teams altogether. That'd be interesting in the SEC where they have a high frequency of scheduling cupcake non-conference opponents (or bye weeks) right before their biggest rivalry or matchup games.
In 2019, for example, LSU played Utah State before their matchup with Florida and had a bye before Alabama. The Crimson Tide also had a bye before that game and then played Western Carolina the week before the Iron Bowl rivalry game against Auburn (who played Samford that week). Georgia had a bye week scheduled before their rivalry game against Florida, etc.