This is my biggest surprise if Tesla never goes for any kind of L3.
L3 is worth something and useful even if limited to more rural routes. There are places it could work for an hour uninterrupted. People will pay for it and use it, and Tesla can advertise they actually have an attention-free system. They can learn much from this in so many regulatory, legal, human factors, and other spaces.
City L2 is just a gimmick where you will have to be on top of it constantly, and mode confusion or over-reliance are going to be real and hurt people, just like current AP does, but with many more immediate threats. Limited city L3 is also a mess, where it's unlikely to find a route that works for more than a few minutes, and unexpected, unhandled events are much more common than the highway.
It seems if Tesla really has all the data, learning, and safety data they claim to, highway L3 isn't that far away. The idea that the next thing they are going to do is leave highway untouched and just grind away at L2 in the city for the next few years is very surprising to me, as it is unlikely to deliver customer and Tesla brand value as quickly as other paths.