Comment by assemblyman

At least for F1 and H-1B visas, one wasn't required to get a new visa physically stamped (for which one would have to leave) to switch schools (undergrad -> grad) or jobs. Is this forced now? Of course, if one wanted the freedom to be able to travel or visit one's home country, a new stamping was required if the old visa expired.

It's not ideal but a lot of us basically didn't leave for several years (even pre-Trump 1) to avoid the hassle of a new stamping.