"If this were to be adopted, the value of taxicab permits would plummet to zero in a very short period of time," Brennan said. 

So there's the crux of the issue...We are constantly hearing how DUI's are a big problem and we're paying to increase police patrols in the evenings specifically to tackle impaired driving but God forbid we allow Uber and Lyft (which are in almost every city on earth) to give people a reliable and affordable way to get home and not drive drunk. They argue we're somehow safer in a retired police cruiser with sketchy brakes, a perpetual check engine light, and 200,000+ miles on it because the cab has an expensive permit from the Muni? Special interest politics on display here.