- Living in a building with a bunch of other 18-22 year olds
- Living in a town that is mostly populated by 18-22 year olds
- Having to figure out how to take care of the laundry and dishes while having time to study and go to parties with said 18-22 year olds.
That being said, I'm currently doing YCs startup school, which is run very similarly to the large lectures I had in college. There is a main weekly lecture or two that is viewable online, and then there is a small group discussion with 15 or so others, led by a "TA". The discussion happens online but is live at a scheduled time (conveniently for me at 7pm).
As a 41 year old with kids, this system has a lot of advantages for me. I can watch the lectures at night after they go to bed, I can watch them in double speed so that I can done quicker and my mind doesn't get bored and wander, and I can do the discussion section from pretty much anywhere with internet.
So I think overall this system is better for me now, but if I were 18, I don't think I'd prefer it.