When all of this transfer portal stuff was happening, one of the reasons (I thought) that this became so popular was the excitement of the recruitment process. After all, you are 16, 17, or 18 years old and you are (in many cases) getting to decide between offers. "Pick me...pick me", the teams plead. You are in your Robert Frost moment -- "Love is an irresistible desire to be irresistibly desired"
And then you make your selection (perhaps you have several hats on a table...or team logos on your X feed and pare them down slowly)!
Then...after the season ends, the excitement of doing this all over again trumps any of the other challenges (will your courses transfer, you sort of liked this town, a significant other you have met, do they have your major at this new school)...not to mention potential NIL money. And then you get promised reps / opportunities ... but it turns out there weren't as many as expected (see the snaps thing above).
And guess what? Back in the portal, to do it again the next year!
The biggest disincentive was sitting out the year. If that doesn't come back, this will continue, I think. Maybe not at the same rate, but much, much higher than it was 10 year ago.