I work at a "flagship public state university" similar to ISU. There are barely any classes on Fridays anymore, and barely anyone around on Fridays (faculty, staff, students, nobody). Good luck if you need to meet in-person with some admin on a Friday, they're all "working" from home. I hear many similar things from colleagues at other institutions. It is just a matter of time until universities are formally closed on Fridays. Informally, many already are.
The reasons are somewhat similar to those described in this thread: students won't sign up for courses that meet on Fridays, and employees won't accept job offers that require them to work in-person more than maybe three days a week. In the Summer and Winter terms, every class we offer has to be online/asynchronous, students won't sign up for them elsewise. This was all coming on the horizon but COVID accelerated it.
I think we should just pull the bandaid and do it. Four-day week. Lengthen the academic year to compensate. Students don't need ~ four months of break between semesters.