I recently rode in a Tesla on FSD for over 26 hours of freeway travel. It was flawless the entire time.
On city streets? 90% was about right. It once took too sharp of a turn at a double right turn and spooked the driver next to us (although it didn’t cross into their lane, just got close), and another time decided to only change lanes halfway into the left turn lane.
I agree that it needs to be near 100% on city streets before it’s ready for launch because that 10% difference is HUGE when it comes to safety. If their “level 5” taxi isn’t using some vastly improved software, it needs to be kept off the street.