Honestly I never even realized how many players are on a D1 roster until last two years with all of the depth and injury issues. You usually think of the QB spot as, barring injury, the position with zero subs all season. Surprising to me we would have 4/5 on the roster given that.
Which brings me to a side point... I've always wondered how some of the kids figure out the decision of "playing" at a D1 school, actually never seeing the field though, compared to just going D2/D3 and playing for 3-4 years. Always intrigued me where the overlap is.