I have only heard my daughter’s school address this question–Yale’s Dean of Admission says they will still admit 1550 freshman for Fall 2021. I think they expect some attrition and an increase in off campus housing to balance things out. Many are skeptical…there’s bound to be some impact. But many schools still stuck to a pretty strict deferral policy–like USC. I think the Ivys and many private LACs were the most flexible with allowing gap year and semester requests. Yale encouraged it no doubt.