I can only see this making traffic worse throughout FiDi and SoMa. Ubers/Lyfts will have a harder time twisting around to get to pickup spots as they are forced deeper into the mostly-one-way streets around market. BART continues to be decrepit with no new capacity nor reach nor increases in reliability. And people will still drive into downtown because SF is incapable of allowing large increases in the number of in-city housing units. All those people from East Bay and South Bay and the peninsula have to get into the city somehow.
I love car-free initiatives and wish SF could be less choked by vehicles during rush hour especially, and maybe this is a start of a bigger revolution, but I’m not holding my breath.
PS As everyone else pointed out, nice carve-out to prop up the taxi industry.