I think it really depends on the school. Our son just started at Denison, and, for a school with a big endowment, the dorms are pretty minimal. Clean but small rooms and no air conditioning. But that’s OK, it’s part of the whole experience. On the other hand, there’s also this: https://www.nytimes.com/2019/08/25/us/college-dorms-mold-health.html