I had a professor comfort a really large class I was in with this gem — ”Don’t worry after the first exam half of you will be gone.” He then modified his proclamation with the fact that if you were over 30 — you had a better chance of being in the group that was still there. I was never so happy to be an old lady in my life. I aced his fucking class and became his TA the next semester. I made it my life’s work for the next 2 years to keep as many students in those seats through the whole semester as possible. Because old people take shit like that personal. Lol. Your point exactly!!