Again- using the current EAP system to make any assumptions at all on how well a different solution running different software on different hardware will do for being dependable is nonsensical.
And imagining that a system that has not yet been developed for hardware that does not exist will be commercially available in 12 to 18 months is equally nonsensical. EAP on HW 2.5 shows what can be done with current software on current hardware. To go beyond that they will need to actually build the next generation hardware and then start writing software for it. And the task we are discussing (driverless car) will require capabilities that nobody has yet demonstrated on any hardware.
It is nonsense to think that the next generation hardware will be able, overnight, to solve problems that even supercomputers cannot yet solve. Driverless cars are coming but are still at least a decade away, in part because of the need to solve cognitive problems that present in a million different forms.
Further, I think it is silly to assert that EAP on HW 2.5 was "not intended" to function on city streets just because Tesla's lawyers made them put that in the owner's manual as a defense against lawsuits by the families of deceased morons who took their eyes off the road while driving. EAP is not FSD, but if it was not "intended" (by Tesla and its engineers) to operate on city streets they would not have allowed it to be engaged or remain on when there's only one lane line. EAP is intended to operate anywhere it can distinguish the lane, and then the lawyers added language to protect them from lawsuits. At the intersection I described it fails to distinguish the lane.
By the way, there are no limited-access highways in Maui. If Tesla "intended" EAP to only function on limited-access highways, they would disable it for cars on Maui. Tesla intends for drivers to push the limits of EAP (with extreme caution: eyes on the road and hands on the wheel) so they can collect data useful in the development of the next step in the (long) road towards FSD.