And laptops have been the norm. It's a little different when you were accustomed to go back to your dorm room where you had your desktop setup to get anything done.
This isn't quite right: before having your desktop computer in your dorm room was normal, you had to go to a computer lab to get anything done, and those had no privacy whatsoever. Computer labs with PCs were quite common until colleges started requiring students to buy their own PCs, and before this, the computer labs had terminals (like VT100) which connected to VAX servers or mainframes.
Anyone who went to college up until the mid-1990s should be familiar with computer labs.
My computer lab in college had a lab monitor who enforced the "library quiet" culture. It was nice.
Virtually every university library has quiet areas and collaborative areas now. Most of my peers go to the library to concentrate (work in solitude) and visit the loud area of the library when they want to be more social or meet in groups. Also it's not like people are constantly talking in the loud area either, most people are by themselves focusing on work but will be interrupted by friends occasionally whereas in the quiet area interruptions don't happen at all. You sometimes end up texting your friend next to you because you don't wanna disturb others.
There was a post a few months ago on HN saying that librarians are rethinking how libraries should be structured because people are using them to go and focus rather than for books.
Your hot-desk point is true though, my peers at the office and at school are more accustomed to carrying around a laptop and setting up wherever rather than setting up a personal workspace with pictures of family and the sort.
Then, they should separately have buildings (or separate spaces within that building maybe, for existing structures) that are dedicated entirely to studying, with both quiet areas with cubicles (there were things like this at the library when I went to college), and more open areas where talking is acceptable. Then, the university can put a cafe there to sell overpriced coffee drinks and snacks, and the building should be very profitable.
I'm also thinking that you might not want lots of food and drink around the stacks of books. But in an open study area, why not?
Finally, if I go to the library to look at stacks of books, the last thing I want is for the bookcases to be surrounded by a somewhat noisy study area with groups of people talking. It should be as quiet as a tomb.