All the changes really are limited to entry into/travel to the U.S. so if one is outside the U.S. or inside the U.S. and hoping to travel outside, the various travel bans and restrictions, etc. could impact one's ability to travel/return to the U.S. Those same bans and restrictions generally don't apply if one is in the U.S. And even with the bans and restrictions, many visas aren't subject, including the B-1/B-2, E-1, E-2, E-3, H-1B1, O-1, and TN.