You could however argue that the current computer isn't powerful enough to run the software required for vision based L3/L4.
I have doubts about that. I wouldn't want to remotely drive that without much better cameras at the very least. Advanced planning to be in the right lane or avoid obstacles is hard when the details are just a couple pixels.
And even if it were true, so what? Last I checked Tesla didn’t have software which can perfectly emulated a human agent.
GP was arguing against:
> The feature is impossible to implement with the sensor suite that comes with the car.
_For that statement_ it's immaterial whether Tesla does something right now, but rather whether it's in principle possible. Modulo your previous objection humans provide a counterexample to that (very general) statement.