Just my anecdote but I lived for several years in a student co-op (kinda like a frat/sorority but run by the students and mixed genders) and we did alot togethe

Just my anecdote but I lived for several years in a student co-op (kinda like a frat/sorority but run by the students and mixed genders) and we did alot together much of which was not academically related but even so I only managed to connect with one person from that time after I left and only then because we happened to run into each other while living in the same city. That was at the largest uni in my state. On the flip-side, though I didn’t stay in contact at the time, I did connect through Facebook with several of my housemates at the college I attended my freshman year (and subsequently dropped out of). I don’t remember anyone from my actual major.