>Relatedly, I once had to get up super early to shadow a friend of mine in a college class. Ended up falling asleep at least twice during the lecture because I was just that damn tired. I had no clue how college students did it but fuck if I didn't think they were troopers.

It helps that, generally speaking, a lot of college students live on campus. It's easier to roll out of bed 20 minutes before class than it is to commute.