1700+ transfers is wild.
Unless I'm missing something, there's 4719 total DI scholarships available (363 teams x 13 per team = 4719). Assuming about 1/4 of guys move on each year (graduation, etc.) and are replaced by incoming freshmen, that leaves around 3500 players who have played a season and can transfer (4719 x 0.75 = 3539).
I'm sure these numbers are still a little skewed with the covid year guys cycling through, but even if it's in the ballpark - 1700/3539 = 48% of players looking for a new school
Someone please correct me if I'm wrong.