Re: I am kind of surprised...
Alternatives could be just as bad.
I recently drove a hire car (a VW Passat) which could alter the cruise control speed to match the road signs.
Except it was clearly also using a database of speed limits: there's a stretch of road nearby where the 40 limit was extended for a further quarter-mile, about 6 years ago. As I passed the 40 repeater (at the old derestricted post), it decided that 60 was clearly the speed I ought to be doing, and activated the loud pedal.