I wasn't referring to a 10% error rate, just a 90% "You can use Apple maps to solve this problem" rate. I've not had any significant error rate with my use cases for a while now.

The 10% use cases I was referring to are the "I want to find generic type of business in this area" case, and the "I need a street view of this" case, both of which are (for me) comparatively rare versus searching for a post-code or known address.