To add to the other responses, the reason why they were capturing sensitive data was most likely because instead of doing filtering and processing live while th

To add to the other responses, the reason why they were capturing sensitive data was most likely because instead of doing filtering and processing live while they were driving around they chose to just deal with that after the fact and process the WiFi data through whatever system they already had for post processing. Even with just recording the SSIDs and timestamps on the vehicle all of the data that was controversial would still be captured by the radio on the vehicle, it would just be discarded immediately instead of being discarded when the Google maps vehicle offloaded that data for processing. If Google wanted to do something nefarious, they could still turn it back on all in software. The only real privacy gain is that they can't retroactively do it but I doubt even originally that they kept the packet dumps around for too long after processing it.