The SAE levels don't measure technical sophistication. In fact when it comes to machine learning, an L4 system is substantially easier to implement than L3 or L

The SAE levels don't measure technical sophistication. In fact when it comes to machine learning, an L4 system is substantially easier to implement than L3 or L2 because the task is monumentally less difficult and you can overfit your way to perceived success. Whether you (or I, or anyone else) thinks Tesla is lagging behind or not has no bearing on the actual reality, and it won't change whether or not Tesla's approach is ultimately successful. Hopefully we're both fortunate to live a few more years and see what happens first hand.