Well, first, some schools are going online only for the latter half of the semester. But my understanding of the current guidance is that this is not enough to

Well, first, some schools are going online only for the latter half of the semester. But my understanding of the current guidance is that this is not enough to meet the in-person requirements, and so students may have to leave anyway and miss that half. Second, intl. travel is highly disrupted already and will continue being so. Some countries will fare worse under covid than others, and so students may get stuck, even after their school states are doing better. No guidance was given on students from travel ban countries, who were already here after the travel bans. Third, student visas expire. Visa politics are very volatile lately. Summing up, many people are now subject to gratuitous uncertainty about whether they'll be able to come back in at all over the next 12 months. Suppose you have to leave, a lot of people have already signed leases, etc. Finally, the guidance so far is quite ambiguous. It is not clear who is able to remain and who won't, and my department sent an email basically saying they are waiting for extra information to know what's going on. That already is bad in itself.