I'm far from representative of all users, but I can't be bothered to use Google Maps anymore. The various integrations that Apple Maps has with Apple Watch and all the improvements it has received over the years makes it just as good if not better than Google Maps for a vast majority of my usage.
You've likely given this far more thought than most people. The majority of people just use what's installed by default and don't ever even look at Google. Defaults are powerful. This is doubly true now that Apple Maps is as good as it's gotten.
Won't use it after it sent my friend to a wrong location and won't use it after it gave me bad coordinates. New iOS will let you change defaults don't remember if it has maps to swap.
