Maps are one area where Apple has a "meh, good enough" attitude, but Google really seems to want to really bring the next level of quality.
A few months ago, they introduced 3D buildings, and Earth shows up-to-date satellite imagery now, but still didn’t update the satellite imagery used in the Maps app.
Worse yet are maps and transit – roads and sometimes entire districts missing, data from somewhere between 2005 and 2009, and no transit data at all.
Every other map service has it all. Apple, Here, Bing, OSM, everything. Google doesn’t.
And yet people here continue using Google Maps, because "it’s the default", and Google Now can only give you estimates from Google Maps.
That shows just how powerful the advantage of a default app is, and how at this point, Google Maps is entirely without competition just because it is the default.
Not even when Google Maps sucks do people switch away – often because many don’t even know there are alternatives.
(And btw, this issue isn’t just like that in one German city, Google Maps is here like that in many places).