My DD lived in a triple last year. None of the rooms in the dorm had railings for the lofted/top bunk beds, so she ended up being very happy about her bottom bunk. She even told me stories about friends who ended up falling off their beds a few times! Also, despite being the bottom bunk, her bed wasn’t really low enough for people to sit on. She used a stepstool to climb into bed (though taller people likely wouldn’t have any issues with that). Top bunk and loft access was through climbing up the end of the bed, and the ladders that some of her friends eventually requested came with no attachment, so they sometimes fell over!