It's "Passpoint" and uses certificate based 802.11x auth, there's really nothing to worry about except calls dropping due to Wifi switchover.
Whitepaper from Aruba here:
Solving the Indoor Wireless Coverage Problem: Passpoint and Wi-Fi Calling https://www.arubanetworks.com/assets/wp/WP_Passpoint_Wi-Fi.p...
Autopilot would have worked fine if the lane markings were properly painted. No one will blame Caltrans terrible maintenance of 101. As I am writing this, NB 101 near Oregon Expressway has been under construction for over two years with no painted lane markings (and the lanes suddenly become super narrow), leading to merge hell and probably at least 3-4 fender benders a week. The Tesla GUI shows you whether or not it can see & track the lane markings, watching the road is much more important than "keeping your hands on the wheel". The one thing I will lay at the foot of Tesla: they really should have implemented eye tracking.