@chdot: Anyone know which driving apps/satnavs use Google and automatically get this update?
Pretty much anyone who uses Google Maps or Waze (owned by Google since 2013) on their phone for navigation will get it. I think those apps and other, less popular ones, are becoming the norm for yer average drivist, especially with phone interfaces like Android Auto and Apple CarPlay commonly being built in to car ICE systems these days.
Standalone (Garmin, Tom Tom etc) or fully integrated satnav used to get updates via an SD card or optical disc, or indirectly over the 'net via a PC. In some cases, particularly with integrated satnav, the media were only made available to dealers, so you had to pay to get the updates installed. More commonly nowadays they are getting, or can get, updated directly over the 'net. But if you already have a multifunctional network-connected device in your pocket, there seems to be little point in buying another such device for a single purpose.
Posher new cars are coming with built-in mobile network connectivity these days so that they can "call home" when they think they're poorly, or have been in an accident. In vehicles like that an integrated satnav can get its updates that way. I don't know who the dominant satnav providers are in that market at the moment but it wouldn't surprise me if Google starts making inroads sooner or later with Android Automotive, in much the same way that it is trying to do with Android TV in smart TVs and set-top boxes.