I use Waze daily to get to work and get back to home. Europe is full with speed traps and total unexpected speed limits. For me Waze is a must have app every time I go somewhere with the car.
I can't say I would ditch my iPhone just because of this (or maybe I would?), but I might get an android phone just to use it with Waze in my car if this really works great...
Apple CarPlay is total useless so far, even to play music from my iPhone in the car, I rather use the built in media app from VW. Apple maps in Europe is a total joke. Many times it tells me I should drive into a one way street or it would try to take me into pedestrian zones...