A poll conducted by GSMArena suggests that Android Auto is used by 50.1% of car owners, while only 17.4% use Apple CarPlay. No insight into the “I use my phone with a holder” camp is given, as they could be Android or iPhone users.
Other poll results are below:
I learn the route for new routes. (Gives me more choice of routes, and an understanding of the area)
I just turn by turn for known routes. (Stops me from always using the same route, defaulting to a non-optimal route, or forgetting about a construction detour)