We live about 5 min. from campus (bought him a car instead of dumping money into dorm/food). Since that is where hubby and I both work, both kids are lucky enough to be graduating with no undergraduate debt. His sister realizes that is a gift, him -- not so much. The Univ is totally physically closed and like all other colleges, the rest of the semester and summer sessions will all be on line. Even his work (Jos. A Banks) is closed down until the shelter-in-place order is over (estimating May 15, but Gov. Carney may extend that). To top all that off, he's supposed to go on a cruise with his GF and her family in August to the Bahamas. Not sure that's going to happen.
I've tried telling him "we want you with us because we love you and want to know that you're safe", and "if something were to happen to your father or I, we would want you to be here with your sister", plus the "this is important to your GF as well". She was in the hospital several times last year due to asthma and breathing related issues.
My daughter (26yo) informed me that boys brains don't approach full maturity until they're around 21 or 22. That may even be a stretch for some guys that I know.