> However, there’s nothing intrinsic to self-driving cars that says that the data they gather needs to be retained or further processed. Remember that for many years, the server logs that recorded all your inter­actions with the web were flushed as a matter of course, because no one could figure out what they were good for, apart from debugging problems when they occurred.

Clearly someone who doesn't understand how machine learning works. The "further use" of the data is obvious: to train and improve the driving algorithm.