* Much lower quality cars (torn seats, smelly, old, safety issues...no one looks good showing up to a date in a Cab).
* Much lower quality drivers (some smoke openly, talk on the phone loudly, don't listen to you, take longer routes than necessary, etc)
* No accountability for service
* No trip data for safety reasons
* No handy log of all your recent trips
* More expensive + tip required
* Sometimes will pester you to be cash-only (even though the credit card machine works, they'll just lie to you)
* Ignore the law and will refuse to give you a ride if you're going to some specific destinations where they don't want to go.
I can go on and on. This is in most American cities. I will not take cabs even if they are cheaper.
Cabs deserve to be eliminated as a transportation option.