> I'm not confident L3 actually exists It's pretty "easy", actually, by making the take-over optional. I.e. you need the driver to take over within a few secon

> I'm not confident L3 actually exists It's pretty "easy", actually, by making the take-over optional. I.e. you need the driver to take over within a few seconds if you can't navigate, but you'll fall back to a safe stop if the driver can't take over. So your auto-pilot doesn't need to handle all situations (well), but you can safely be inattentive; it might just cause a sub-optimal response.