i see that tweet as the govt prompting tesla to accept mil hardware and access points into their security software; tesla perfects the software and then distributes it as an industry standard for self-driving vehicles.
People reading between the lines might say tesla is safe because it has govt backing, and musk is pointing this out for Company Stock price security.
the technology for self-driving cars is made more 'safe' and standard and the government will have geolocational access points to all self-driving cars…
a killswitch? its possible to do now.
Food for thought, Idk thats how I read it.